Good point. Let me write code to cap the extra damage.
Thanks for the input EDIT:
ABILITY - Brilliance Aura :: New
(Reworked)
Effect 1: Increases mana regen of units in range by 50% (+10% per/lvl)
Effect 2: Every third spell cast by units under the effect of Brilliance Aura will deal 10% (+1% per/lvl) of their maximum mana as damage in an aoe of 200 (+25 per/lvl).
-Total damage caps at 65 (+35 per/lvl)
-Spell count stacks remain even out of Brilliance Aura.