I did Zevrim Thornhoof and Hydrospawn in DM E last week, but couldn't get Alzzin the Wildshaper down due to low dps. So I decided to do LBRS to finally get Blackcrow (this thing's gotta have a 1% drop chance) to up my dps. I'm better off waiting for Bloodseeker though...
Pretty much every boss in LBRS is soloable, but clearing all the necessary mobs on your own is time consuming to say the least.
Btw, if you kite Ras Frostwhisper to Gandling's room, are you not able to out range his Frostbolts?