All these feats trigger on a critical hit and say "if your confirmation roll exceeds your opponent’s CMD, you may X".
Which, if any, of the following bonuses apply to the confirmation roll for the purposes of the CMD check?
i) +2 CMB bonus from Improved Sunder
ii) CMB bonus from weapons with sundering property
iii) +4 from Critical Focus?
iv) Penalties from power attack
v) Penalties from iterative attacks
v) To hit bonus from strength and bab
I suspect they all apply except Critical Focus, but the Feat's wording doesn't make the design intent clear :(
EDIT - I'm assuming this feat is reusing the crit confirmation roll, am I wrong there?
Sunder/trip/disarm are all assumed to use the weapon you have in your hand. You can apply the enhancement bonus on the weapon to your roll as well as other special weapon abilities such as the dueling property from PFS that adds double your enhancement to bonus to your CMB on maneuvers that use your weapon. Penalties to hit apply such as reduced BAB on iterative strikes. Pretty much anything that modifies your normal attack roll will also modify your CMB, in addition to anything used to specifically modify your CMB.
I'm honestly not sure if the bonus from Critical Focus should apply, but since the feat specifies your critical confirmation roll and critical focus applies to that, it does seem like it probably should.
There's no CMB vs CMD check with those feats. If your regular critical confirmation roll happens to be good enough to exceed the opponent's CMD, "X" happens.
In other words, the critical confirmation roll uses the exact same modifiers as the original attack roll, with bonuses for things that specifically work off critical confirmation rolls (such as Critical Focus).
Nothing that applies only to CMB will work, as there's no CMB roll.
So from your list, "i" and "ii" don't apply, while "iii", "iv", "v", and "vi" all do.
There's no CMB vs CMD check with those feats. If your regular critical confirmation roll happens to be good enough to exceed the opponent's CMD, "X" happens.
In other words, the critical confirmation roll uses the exact same modifiers as the original attack roll, with bonuses for things that specifically work off critical confirmation rolls (such as Critical Focus).
Nothing that applies only to CMB will work, as there's no CMB roll.
So from your list, "i" and "ii" don't apply, while "iii", "iv", "v", and "vi" all do.
I agree. You roll your hit, then your threat confirmation, then check your confirmation roll against the target's CMD.
Against a creature with a high AC and low CMD, you could fail to confirm the threat but still succeed in the combat maneuver.