I found Abominations are a lot easier to melee than Trolls (Tree log ones). I think it's because the default roll works better as their attack range is lower. Axes and swords make pretty short work of them, but they are an intimidating sight. I first killed one with fire arrows which honestly was a huge waste of time and ammo. It got me in more trouble than it was worth given all the kiting just caught the attention of new spawns.