Gear score is not the issue here. Gear score is easily inflated with bad stat balance, and does in no way indicate the player's level of skill. A large portion of this game's population are players who exploit their way past TRASH in dungeons. I wouldn't expect much skill to be found among players who cheat in an MMO.
My regular group has all 5 classes, and we have no problems with any of the T2 bosses. Sure, we wiped a few times when experimenting and learning, but that is to be expected. If your tactics are not working, then you just need to change them. Yes, the current boss mechanics feel mediocre, but they're certainly not…