Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

So in the original Nnw combat expertise gave you 5 ac and imp. combat expertise gave you 10. In exchange you suffered -5 and -10 ab. For some reason they nerfed them when creating Nwn2... this is bad. I propose restoring them to their original values, 5 and 10 respectively. More ac is always nice given how easy it is for epic mobs to hit you.

3 and 6 is already a lot. Considering that's basically 6 penalty free points of AC for caster classes. 6 AC for 2 feats is already much better than any two epic AC feats. Warlocks and armoured sorcerers would abuse this even more than they already do.

Edit: Also, epic mobs have relatively low ab and ac but high hp.

Most mobs would end up hitting you the same amount of times anyway. Normally there is a built in 5% chance to hit via natural 20's on the die roll. On BG this 5% is skewed to more like 25 - 35% from what I can see based on an artificially increased number of natural 20's due to the server being set on the higher difficulty mode. This is why casters with things like mirror image and classes with DR have an advantage over pure armored classes. The only way to lower the artificially high auto hit is by having concealment or just reducing the damage done via DR.

Just use Mirror image with displacement if you feel you are getting hit too much. That is so OP you will love the results. If you can not use those things I am sorry.....Here magic reigns supreme on all levels so pure melee gets hosed.