Optimize for 100% Melee accuracy. Annihilation, and to a lesser extent Rage, do not rely NEARLY as heavily on melee accuracy as Carnage does. Annihilation flat doesn't NEED higher than 100%, and for Rage I just wouldn't recommend it. The reason is because of how your significant damage is done. With Rage, it's the force based derpsmash, and with Annihilation it's the bleeds. Neither of which use Melee accuracy at all. The cleave on Vicious Strike Spam in Rage is also not an offhand strike, so no worries there.