Wildshape (3.5) interaction with craven & rend?

So, a 15th level druid (with other classes added) wildshapes in to a legendary ape.

He possesses the following feats/abilities:

Craven You take a -2 penalty on saving throws against fear effects. However, when making a sneak attack, you deal an extra 1 point of damage per character level.

Sudden Strike (Ex): Whenever a target is denied a Dexterity bonus to its AC (whether the target actually has a Dexterity bonus or not), you deal an extra 1d6 points of damage with the attack. You can’t use sudden strike when flanking an opponent unless that opponent is denied its Dexterity bonus to AC.

Rend (Ex): If a legendary ape hits a single target with both claws, it latches onto the opponent’s body and tears the flesh. This attack deals 2d8+15 points of damage.

My question is: if said druid wildshaped attacks and hits with all of his attacks does he apply the Craven damage to the rend – technically the claws are in the target and he rips them out – during this last phase – no to hit roll is needed and certainly dexterity is not a factor – but is it irrelevant? Or does it only apply if the target had previously had no Dex bonus (for whatever reason).

Many thanks.

Also – Is the answer any different if he had flanking instead of sudden strike?