Dont quote me but I think another part of where tamers arent doing as well down there is the short duration it takes to take one down. Before you were almost always going to be in the top because the pet actually tanked and it took a while so you had decent damage over time; only now there is no time.....im seeing DF's die in under 2 minutes as archers, in droves, with 200+ damage a shot let fly. Really hard for a pup hitting at maybe 40 damage per bite every couple of seconds to keep up.
I know on my disco-mage (which i use for doom now instead of tamer), in wraith form, i can cast flamestrike forever doing 210+ per shot to DF. (115 eval, 50+ SDI and Demon Book)......ive done really well. w/ 2/6 casting and the leeching from SS in wraith its insane and i know some archers are outdamaging me. My tamer simply couldnt compete.