All builds are optimized for great AC without dipping into gimpitude.
It could a situation where he needs a lot of mobility, as well.
Plus, the AC aura is not limited to the intimitank paladins. Many DPS paladins will have some ranks in it for the beenfit of others and/or themselves.
Other fixes that may fix the problem are:
- Change IR into non-Dodge.
- Add items with lower bonus of the bonus type introduced by the new IR.
- Change Chattering Ring into non-Dodge (NOT the same bonus type as the new IR)
- Add items with lower bonus of the bonus type introduced by the new Chattering Ring.
- Remove Favored Defense.
- Increase S&B DPS.
- Add new mitigation methods for S&B, like passive DR.
- Add a few extra S&B-only AC via feats. (Careful to not add too much.)
There are possibly others, but yes, fixing will not be not easy.