[Chaos]

I would first like to ask:

Is there any plausible method to determine who's the caster without having to resort to Magaisendo/Wretched Oil? So far, it seems like an 'all-or-nothing' alternative to Guard, except almost 100% safe against anything that can't AoE the entire triangle. If this is the case, that shouldn't be plausible without either some way to figure out which one's real, or a penalty for when the opponent makes the correct guess.