I will admit trees are really challenging sometimes, mainly because you can forget about food while foresting easily when your swatting greylings with ease. Then a tree falls in the wrong direction and *whelp*.
I have yet to kill an abomination because i haven't gone to a swamp since update, so not sure on those. Creature-wise the bane of my existence has to be the tar pit oozes, I attempt to close distance on them before i agro, because of their ranged capacity.... but damn once they start spewing its all luck.