>>534519478
>groggy is usually controlled by how much damage you're doing. Damage is irrelevant here and it's all from the adds just dying
nta but Tiphareth, right? the three cores having their attacks backfire on them also helps contribute to the groggy gauge

Yellow Core that fires missiles - if it hits a student with a shield, it bounces back to it, causing damage and groggy
Red Core with heatwave is straightforward
Blue Core that applies damage reduction buff on itself, have the student that's targetted by the blue orb (usually Aoba) fly towards it, damage + dispel the debuff
To add to that, every time the core gets backstabbed twice (usually Red Core does this), the targetted core gets damage received increase debuff

sure, the changes to the groggy timer could be minimal, but there are certainly ways to exploit these gimmicks to be able to deal more damage faster