Stacking AC bonuses?

[DracoSuave]

If this is the case, why would anyone take ANY other feat with a bonus to hit/dam/defenses than Expertise/Focus/Improved Defenses?

You wouldn't.

Unless they were higher, or they had an additional rider that made them more efficient than two seperate feats. Or they stacked.

As for the question on when they stack:

Ignore the fact the bonuses come from feats, powers, or anything else. What is important is the -type- of bonus.

So, if a game element gives you a "+2 feat bonus" then that does not stack with any other "feat bonus." For example, Heavy Blade Expertise. (+1 feat bonus to attack)

However, if a game element gives you a "+2 bonus" and does not mention a type, then it stacks with every other bonus regardless of source. For example, Blade Opportunist. (+1 bonus to attack with opportunity attacks. Notice: the bonus does not have a name)

As well, not all bonuses from feats are "feat bonuses." There's a couple "power bonuses" in there to make things confusing. Power bonuses do stack with feat bonuses, but not other power bonuses.

As a tendancy, most situational or class-feature-constant bonuses are untyped (the bonus you get from combat advantage, the bonus you get to damage from the sorcerer's class feature, the fighter's +1 to attack) and most bonuses you get from feats or powers are typed.

 

[eamon]

Just be aware that your Rogue can get very dead from nothing but regular attacks, if though every OA misses. Also, if you provoke enough OAs, some of them will still hit, and many of the ones that hit will be crits. I found that out the hard way.

Actually, it's fairly possible to become virtually unhittable by OA's vs. AC - and even a natural 20 does not guarantee a crit; a natural 20 is only a crit when the attack roll would normally hit. For example, if you've an AC of 31 vs. OA's and a monster has a +10 to hit, then rolling a 20 will result in an automatic hit (due to the natural 20), but not in a crit (since 20+10 < AC 31).