Selecting the right 2XKO fuses is the most important decision you will make at the character select screen besides picking your champions.
In Riot Games' high octane tag fighter, the fuse system acts as a specialized modifier that dictates how your two characters interact with each other.
It is not just a passive stat boost; it fundamentally changes the rules of the game.
Whether you want to chain multiple supers for a flashy finish or swap between characters twice in a single combo to keep your opponent guessing, your fuse choice defines your entire win condition.
The beauty of this system lies in its flexibility. A team of Ekko and Ahri might play completely differently depending on whether you are prioritizing raw damage or complex mixups.
If you are coming from other tag fighters like Marvel vs. Capcom or Dragon Ball FighterZ, you might find the level of customization here refreshing.
However, it can also be overwhelming if you do not understand the mechanical nuances of each option.
What exactly are 2XKO fuses?
Fuses are team wide modifiers chosen after you pick your two champions that alter your tag and assist mechanics.
Think of them as "grooves" or "playstyles" that you lock in for the duration of the match. While your character’s move list remains the same, the way they flow into one another changes.
In the current build of the game, there are five primary fuses available: Double Down, 2X Assist, Freestyle, Sidekick, and Juggernaut.
Source: Reddit
Each of these caters to a different level of player skill and a different strategic goal. Some are designed to help you squeeze out every last drop of damage from a combo, while others focus on giving you more defensive options or easier execution.
You cannot change your fuse between rounds, so you need to have a clear game plan before the match starts.
If you are playing in a duo with a friend, your fuse choice becomes even more critical as it dictates how you will coordinate your assists and tags.
Double Down Fuse Explained
Double Down is often the go to choice for players who want to see massive health bars melt because it allows you to cancel a super into another super from your partner.
Normally, you can only perform one super per sequence before the combo ends or resets. With Double Down, you can trigger your point character’s Level 1 super and, during the animation, call in your assist to perform their own super.
This fuse is particularly effective for teams that have high synergy in their cinematic attacks. For example, using Darius to land a heavy hitting super and then cancelling into Yasuo's ultimate can effectively end a round from 50 percent health.
- Super Cancels: You can cancel Super 1 (S1) or Super 2 (S2) into your partner's S1, S2, or Ultimate.
- Handshake Tags: You can perform a handshake tag during the super animation to switch who stays on the field after the attacks finish.
- Damage Ceiling: It offers the highest immediate burst damage in the game.
The downside is that it is meter heavy. If you do not have the resources to fuel two supers, you are essentially playing without a fuse benefit. It is a "win harder" mechanic that rewards good resource management and high damage conversions.
Freestyle Fuse Explained
Freestyle is the most technically demanding fuse in 2XKO because it allows you to perform two Handshake Tags in a single sequence.
In a standard match, once you tag your partner in during a combo, you are locked into that character until the sequence ends or you call another assist later.
Freestyle breaks this rule. It allows for "looping" combos where Character A starts, tags in Character B, and then tags back to Character A to finish the job.
This creates terrifying "sandwich" situations. When you have two characters on the screen and you can swap between them twice, the opponent has to constantly guess which side the next hit is coming from.
- Start a combo with Ahri.
- Call Ekko for an assist and immediately Handshake Tag to him.
- Use Ekko’s speed to reposition behind the opponent.
- Handshake Tag back to Ahri while the opponent is still reeling from the side switch.
This fuse is a favorite for high level competitive players who enjoy laboratory time. It opens up creative routes that are simply impossible with any other modifier.
2X Assist Fuse Explained
The 2X Assist fuse is designed for players who want to dominate the screen with partner actions by allowing your assist character to perform two attacks in a single call.
Usually, when you press the assist button, your partner jumps in, does one move, and leaves.
With 2X Assist, you can press the button again (or a different assist direction) to have them stay on the field for a second action.
This is incredibly powerful for "locking down" an opponent. If you are playing a character with a slow projectile, you can call an assist to cover your approach, and then use the second assist action to keep the opponent in blockstun while you go for a high/low mixup.
- Pressure: It keeps the opponent in a defensive state for much longer.
- Safety: You can use the first assist to bait a move and the second to punish it.
- Versatility: You can mix and match forward and back assists in the same call.
Teams using Illaoi often favor this fuse because her tentacles provide excellent screen coverage, and being able to trigger them twice makes her almost impossible to approach.
Juggernaut Fuse Explained
Juggernaut is a unique addition to the 2XKO fuses list because it effectively turns the game into a 1v1 fighter for you.
When you pick Juggernaut, you lose access to your second character during the round, but your point character becomes a literal raid boss.
You get a massive health boost, increased damage, and a larger meter capacity (up to 5 bars instead of the usual 3).
This is perfect for players who prefer to master one character deeply rather than managing the complexity of a tag system. However, it is a high risk strategy. Without an assist to bail you out of pressure or extend your combos, you have to be perfect with your fundamentals.
- Fury Break: Juggernaut gives you access to a stronger version of the "Burst" mechanic that can turn the tide of a match.
- Self Cancels: You can cancel supers into each other using only one character.
- Extra Durability: The health bonus allows you to survive combos that would normally kill a standard team.
While it might seem like a "beginner" fuse, it has a very high skill ceiling in competitive play because of the meter management required to make the most of those 5 bars.
Sidekick Fuse Explained
Sidekick is the sister fuse to Juggernaut, but it keeps your assist character on the sidelines. Your assist never actually tags in to become the point character; they act purely as a support tool. This is great for players who have one "main" they love but still want the benefits of assist pressure.
In this mode, your assist cannot be KO'd because they never fully enter the field in a vulnerable state.
They provide defensive buffs and specialized support actions that empower your point character. It is a more stable, less "swingy" version of the tag system.
If you find the constant swapping of characters disorienting, Sidekick offers a more traditional fighting game experience while still giving you the "plus one" advantage of a tag fighter.
What is the best fuse for beginners starting today?
If you are just starting out, Riot actually removed the "Pulse" fuse and turned it into an optional "Pulse Combo" toggle.
This means you can now use any fuse while still having access to simplified auto combos. For absolute beginners, Double Down is generally the best recommendation.
Double Down is intuitive. You land a hit, you press your super buttons, and then you press them again for your partner.
You don't need to learn complex "handshake" timings or manage multiple assist calls to see a benefit. It provides an immediate reward for simply playing the game.
As you grow more comfortable with the rhythm of the match, you can then experiment with 2X Assist or Freestyle.
Comparing the Primary 2XKO Fuses
| Fuse Name | Difficulty | Primary Benefit | Best Team Style |
| Double Down | Easy | Massive Super Damage | High Burst/Execution Heavy |
| 2X Assist | Medium | Screen Control/Pressure | Zoning and Setplay |
| Freestyle | Hard | Creative Combo Paths | High Mobility/Mixup Heavy |
| Sidekick | Easy | Consistent Support | "Main" Focused Play |
| Juggernaut | Medium | Solo Powerhouse | Fundamentals/Solo Mastery |
How do you choose the right fuse for your specific team?
Choosing between the available 2XKO fuses comes down to identifying your team's biggest weakness.
Do you struggle to open up opponents who block everything? Pick 2X Assist or Freestyle to increase your mixup potential.
Do you find yourself getting the opponent to 10 percent health but failing to close the round? Double Down will give you that extra finishing power.
You should also consider your champions' individual strengths. Characters like Braum, who have massive defensive utility, pair exceptionally well with 2X Assist because he can provide a wall of protection for your other character.
High speed characters like Ekko thrive with Freestyle because they can abuse the multiple tags to stay unpredictable.
- Analyze your replays: Are you sitting on full meter at the end of rounds? You might need Double Down.
- Check your pressure: Is the opponent jumping out of your pressure easily? Try 2X Assist to keep them grounded.
- Test your comfort: If you keep forgetting to tag, Juggernaut might actually be your strongest option until your game sense improves.
The fuse system is what makes 2XKO stand out in a crowded market of fighting games. It allows for a level of expression that few other titles can match. By understanding the mechanical differences between Double Down's raw power, Freestyle's complexity, and 2X Assist's pressure, you can build a team that feels uniquely yours.
Remember that no fuse will save you if your connection is lagging. Make sure your network is as optimized as your combos.
Once you have a stable environment, take these fuses into training mode and see which one feels the most natural to your playstyle. The "right" choice is the one that makes you feel the most confident when the round starts.
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