Originally Posted by
Yelsha
It'd be difficult to calculate an exact maximum due to unknown stun chances.
Its possible to estimate to look at the existing top players who already have maxxed runes and talents and nearly maxxed stars/weapons/saintings by seeing how much potential damage they can add on per hit.
The current top average damages are in the 30-40M per round range over a sufficiently long Banish (shorter Banishes tend to have higher averages for an unexplained reason).
Hence we can figure that the highest sustainable damage using current mechanic is in the range of 40-50M damage per round. (4 Stunners, Lvl 12 runes, Max BS/Talents, Max stars).