I just don't understand how any non-4xShaman arena teams are going be be able to handle this.

I guess warriors gets a Jump Stun, but meh.

Other shaman can do this to you, but most likely your alts will go to the same spot, and you will then be oor of any other DPS. The enemy shaman could get between your main and your Alts, and really F you up, but you really shouldn't have let him get that close in the first place