Quote Originally Posted by LoyalPaladin View Post
Hmmm. I like the tremorsense. That is really fitting for them. It really annoys me how bad AC is.
I was accidentally using the Great Wyrm Black Dragon instead of a Wyrm. A Wyrm needs a 2 to hit you if you have 44 AC (+7 from Shield, +5 Ring, +5 Amulet, 13 mithral full plate, +3 Dex, +1 dustry rose ioun stone), or a 1 with 4 WF feats and Gr. Multiweapon Fighting (so a 2 since it's not worth 6 feats... though it could replace them with 1 epic feat if the DM wanted it to). This means that since it deals (averages) 26, 15, 15, 13, 13, 27 damage with its attacks, if you go full AC the dragon is actually better off not PAing you, but each point below 44 AC you have is one point of PA the dragon should use.

Note against the other CR 20 MM creatures

Pit Fiend needs a 14 to hit AC 44 with its claws, 16 with its other 4 attacks.

Balor needs a 13/18/20/20/14/19 with its routine.

The problem is caster critters, and that dragon CR seems to be calculated in its own weird dimension.