i know this is an older post, but what in the world were you wearing to get cataclysm nearly to 4k? i just cant see it, i used 2 +MAB atma (60 total) and smiting blow with plutos staff, and with 100 tp i did 1100 to mandies in abyssea - tahrongi.
i know that atma is less than ideal, but removing the 2 MAB atma, and replacing it with cosmos and ultimate, i still cant see it doing much more than 1.7-2k at 100%.
I think because stacking MAB isn't as effective as stacking Cosmos, Ultimate w/ Smiting blow. Because unlike MAB each stacks on itself. Instead of 1 calculation.
So it's "1.5MAB + 1.4 darkness attack" VS "1.6MAB".
I found that out on the drk forums. When it was better to stack Griffin's claw(20%2h WS) over Baying Moon(+30MAB).
So I guess the difference on a normal 1000 dmg WS would be:
1600 w/ 60MAB.
2100 w 50MAB and 40% darkness. Making it more than a 90% increase as implied.