Don't be surprised to find wizard bodies as most people here solo and these guys have over 8k hp, they con blue to a 50 wiz and a 59 necro so be forewarned, there is also a herdmaster who summons and a train of these are pretty nasty, if you run through the otter village the otters will aggro on the buthars and you will have a greater chance of survival
Went there last night with a group of 42-44s. Most of these were between lvls 43-45. Druid tried to pull one, got 3. Enchanter mezzed one easy, druid took one to otters. We fought the other one for quite a while till otters came and KSed us. Some members had to log after this. Will try again tommorrow.
There is also a quest at the otters for the trunks of these guys, will hopefully be able to do that as well. I believe that they require 2 trunks.