Conqueror... always the Conqueror. And after that, everything that combines with Defense Mastery.
Back in IT days, i would have added the Bringand too, but now, i don't know... i guess it's still one of my favorites, but since AE, i get frustrated playing Bow characters past Epic difficulty... So if we remove the melee options mentioned above, i guess my favorite will be double throw Thunderer.