I've posted a bug report over here: Bug 302 – HB stops responding when it encounters a channeling mob but I'm curious to see if its something anyone else has come across, and if so how have you dealt with it? HB seems to stop responding when it encounters a mob that is channeling at a target (there's a couple places in hyjal where mobs channel at poles). It runs up, sees the npc is casting, deselects the mob and stands there like an idiot until something else attacks it or you hit stop, move the bot and start again.
