I agree something is wrong here. I tried to do this with my lvl 42 warden and breezed through everything till the final boss. He heals himself constantly, and The Boot (which is supposed to interrupt inductions) only works less than half the time. So it was impossible to kill him, I kept going for about 20 minutes and then just let him kill Legolas. I have no idea why my skill is not interrupting his healing, it should stop inductions and always has before.
As soon as they idiot proof something, the others send in some slack-jawed, drooling stooge to gum up the works.