Unit Analysis by Team BethelFrankel
Class
Overcentralizing Sniper-Detonator-Support-Please-Nerf.
Overall
S
(SS at BT3)
Advantages
+At BT3: Craziest team-wide buff in the game. Turn 1 after active (assume max stats) you get ~190-260 ATK, equivalent to ~3-4 Sinsa DEF shred stacks. Turn 6, this is doubled.
+Is a Sniper on off turns and a (pseudo) Detonator on burst turns, which is when you want to have each respective class
+Ridiculously strong chain for mobbing
Disadvantages
-Painful startup without BT3, enough that there's a significant drop off in DPR outside of all but the longest stages
Explanation
Reinhardt was the first sniper to cross into general SS-tier (at BT3), and all it took was to literally make her a detonator on the turns she's relevant, and give her the single strongest support buff* in the game after Florine's double chain. After some calculation, Reanimu has her BT0 ATK buff as stronger than Sinsa's maximum defense shred starting from turn 5 - you know, the whole reason that Sinsa was originally in SS-tier. Combine that with the strongest flexibility in detonation output we've seen, like, ever, and a base Sniper chassis that mobs harder than basically anyone, and Reinhardt's the real deal. She even synergizes with Florine for some reason - her active Air Strikes are considered chain combos, sort of like Azure's Mirage.
*If you're new to the game, %ATK buffs are much stronger than any other buff in the game because they modify stats before DEF penalty is taken into account.