As an archer primary most runs, I find the Abominations to be.. a pain in the rear.. pretty much useless as killing them requires kiting them out of the swamp or else they'll just run away as soon as you get a good burn stack going on them. In that sense they are like the graylings of the swamp.

The root armor set seems far more helpful to melee primaries who want to use a bow once in awhile. While the poison resist helm is nice, resist meads work fine and as for the chest penetration resist, playing a ranged character it is pretty easy to just zig zag, strafe, and use obstacles to foul up enemy archers. Maybe worthwhile later for skeeters but it comes with a 'please burn me' weakness so... not entirely sold on that. Then there is the movement penalty.. so meh.