Gundrak should be doable. Just remember on Colossus to use nature resist totems. That will save you a ton of shifting out of puddles (wasted dps time) early on, you may need a group heal or two during elemental phase. Everything else in there is pretty easy. On the last guy, I fight in the alcove to the right so my guys cant be knocked all over the place. if they start getting thrown, hit IWT to bring them all back in together, then have the tank pull him back a little if he goes back into troll form to keep whirlwind from killing the team.

On nexus, Commander can be annoying with his fear. Just be sure to kill him first. id pop cooldowns on him. Telestra isnt bad. Just make sure you have a key that will rotate your party towards her. mine has Interact with target , then once i see them turn I follow with a down arrow to them all. Burn the ice clone down first since it AoEs. Anomolous is a joke now with only 1 rift. The last boss isnt hard. The key is making sure everyone is right under him. That way the spikes wont hit you.

I skipped Stratholme till the team was better geared. It was such a long run back if you wiped, and the little zombies make it hard to recover otherwise.

I also found VH a little hard burning stuff down fast enough when I first started. Plus if you get a boss down, then wipe, you have to fight all over including that boss.

Other then that, First boss in HoL, first 2 in UP