People hate group in CV for some reason, so you have to get creative. Here's an easy way to solo Torgvall without having to wait for 3-5 level 30s to come help you.
1. Buy health potions. I've never needed more than 5, but buy 10 in case you need to do it twice.
2. Clear the mobs around Torg, run off to reset Torgvall.
3. Observe the tents near Torg. You can hop over them and because he is too big, he has to run around. Basically, you can move between one side of the tent and the other while he has to move around them. So, he can be forced to chase you since the path he takes is always 2-3 times as long as the path you take.
4. Fight him, when your health gets about 50% hop over the tents (to the side he isnt on) and take a health pot. Hop back and forth until healed.
5. Keep fighting until you take him down.
Warning: you might have to fight adds more than once, so keep a thought toward respawns. Also, you have to hit torgvall every 45 secs or he will reset. This is easy as you only need 25 to regen with the potions.
I've done it with the necro, hox, ranger, and guard so far all level 30-34. It's easy, just a bit slow.