10 Best Fusion Perks In Squad Busters

Fusion is one of the most powerful mechanics in Squad Busters, giving your squad a massive edge by reducing chest costs and unlocking stronger abilities as you progress. To unlock each Fusion tier, you’ll need to collect enough duplicates of a character — ten Baby versions to access their Classic Fusion, ten Classics to unlock Super Fusion, and so on until you reach their final evolution. Since every unit comes with its own unique set of perks, choosing which characters to invest in can make or break your runs. In this guide, we’ll break down the 10 best Fusion perks in Squad Busters and explain why these upgrades should be at the top of your priority list.

#10: Mortis

Mortis is one of the most versatile Epic troops in Squad Busters, thanks to his ability to turn fallen enemies into allies. Even in his Baby form, he can revive three defeated units to fight for your side, which can quickly swing momentum in your favor. His Classic Fusion makes things even more interesting by converting those revived enemies into bats, giving you extra pressure against opponents. The real payoff comes when you unlock his Ultra Fusion, as every revived enemy also spawns bats that chip away at enemy squads. Investing in Mortis is always worthwhile, and you should prioritize grabbing his units from daily shop deals whenever possible to build him up fast.

#9: Battle Healer

Battle Healer is one of the strongest support units you can add to your squad in Squad Busters, thanks to her incredible healing potential. Even in her Baby form, she provides a solid 400 HP boost to allies, but once you unlock her Classic and Super Fusion, that healing jumps to 600 and even extends to restoring health every time you open a chest. Starting with 1,800 base HP and scaling up to a massive 6,300 with Fusion, she becomes a tanky healer who can keep your team alive during the toughest fights. Having Battle Healer on your side gives your squad the sustain needed to outlast and overpower enemy teams.

#8: Witch

Witch stands out as one of the strongest units in Squad Busters because of her ability to overwhelm enemies with summoned skeletons. Even in her Baby form, she can quickly build pressure by spawning minions, but her real potential shines once you unlock her higher Fusions. With her Super Fusion, Witch not only summons additional skeletons but also gains the powerful Skeleton Barrel Spell, letting you unleash a wave of minions directly onto your opponents. Pushing her further to Ultra Fusion transforms her skeleton army into a deadly force with increased strength and attack speed, making her a must-have for players who want to dominate fights through relentless swarming power.

#7: Hog Rider

Hog Rider is an excellent pick if you want to cover ground quickly and stay ahead of your opponents in Squad Busters. His Baby form already gives you a handy Turbo boost when moving through grass, but his real value comes once you evolve him. At Classic and Super Fusion, the Turbo effect not only lasts much longer but also recharges at a faster rate, letting you maintain speed throughout the match. On top of his mobility, Hog Rider’s strong DPS makes him a solid fighter, especially in battles against tough bosses like the Golem or Mega Knight. If you’re aiming for fast rotations and powerful pushes, investing in Hog Rider is absolutely worth it.

#6: Trader

Trader is one of the strongest support units in Squad Busters thanks to his ability to generate gems, which are the key to securing victory. In his Baby form, he provides two gems for every 15 coins collected, giving you an early edge in resource management. As you evolve him, the gem output increases while also granting your allies a handy HP boost, making him even more valuable. His Super and Ultra Fusion perks push this further by improving both gem generation and healing support. When paired with other suppliers like Greg, Trader becomes a gem-farming powerhouse that can easily tilt matches in your favor.

#5: Medic

Medic is a reliable healing unit in Squad Busters and becomes a true game-changer once you unlock his Fusions. In his Baby form, he already provides decent support, but his Classic Fusion is where he starts to shine, tossing Heal Packs that restore a big chunk of HP to teammates. As you push further into late-game fights, his Super and Ultra Fusions make him even more valuable, letting him heal allies passively while still throwing powerful Heal Packs to keep your squad alive. Unlocking Medic’s Fusions early ensures your team can outlast tough enemies and remain strong in drawn-out battles.

#4: Tank

Tank is already a solid unit on her own, but her real power shows once you start unlocking her Fusions. In her Classic Fusion form, she becomes a serious damage dealer, as her tanks enter Overdrive and can shred through opponents with ease. She’s a must-have in any squad and works best when paired with both ranged and melee allies to cover her pushes. Evolving her further into Super and Ultra Fusion makes her even scarier, with tanks starting in Overdrive and gaining repairs during battle, giving her unmatched staying power and consistent damage throughout a match.

#3: Heavy

Heavy is already a reliable ranged unit from the start, but once you unlock his Fusion perks, he turns into a powerhouse that can carry fights. His Classic Fusion boosts attack speed and adds healing, making him much harder to take down, while his Super Fusion pushes his fire rate even higher, letting him shred through enemies and bosses alike. Pairing Heavy with frontline melee units like Barbarian King or El Primo makes your squad nearly unstoppable, as they protect him while he dishes out nonstop damage. His Ultra Fusion pushes things to the next level with even faster shots and healing support, making him one of the most valuable units you can evolve.

#2: Barbarian King

Barbarian King is one of the strongest frontline leaders in Squad Busters, capable of tearing through enemies even in his base form. Once you start evolving him, his true strength comes out, as he not only powers up your melee allies but also becomes a devastating fighter himself with his Iron Fist ability. Choosing him in your squad gives you a massive edge in close combat, and unlocking his Super and Ultra Fusions makes him nearly unstoppable. With these upgrades, he can heal while idle and unleash a Super Rage spell that drastically boosts the attack speed of your entire team, turning any fight in your favor.

#1: Archer Queen

Archer Queen stands out as one of the most versatile ranged units in Squad Busters, capable of shredding enemies while boosting the overall firepower of your squad. She shines when paired with other ranged allies, as her attack speed buff makes the entire backline much deadlier. Her Classic Fusion adds explosive arrows that deal splash damage, giving her strong crowd-control potential, while her solid HP lets her hold her own against tougher enemies. Advancing to her Super Fusion unlocks passive healing when idle, making her far more sustainable in drawn-out matches. At Ultra Fusion, she gains access to the devastating X-Bow spell, allowing you to summon a structure that continuously rains arrows on enemies. Even without her Ultra, unlocking her Super is highly recommended to keep her impactful throughout every stage of a fight.

Conclusion

Fusion perks in Squad Busters can completely change the flow of a match, giving your squad the edge it needs to dominate late-game battles. From utility-focused units like Trader and Medic to powerhouse leaders like Barbarian King and Archer Queen, knowing which characters to evolve first makes all the difference. Each fusion adds unique strengths—whether it’s more healing, faster attacks, or powerful spells—and investing in the right ones ensures you always stay ahead of your opponents. If you’re looking to build squads that can handle any situation, focusing on the best fusion perks is the smartest path to victory.