Ice is actually probably the best tank to use for Hami tanking . As most of the shields are 100% redundant against Hami, what you really need is a way to get massive +HP for a HP buffer and a panic button in case the empaths in your team die. Ice has both of these in the form of Hoarfrost (essentially the same as Dull Pain, gives a boost to the tanks HP) and Hibernate (phase shift except you get MASSIVE regeneration whilst Hibernating). While the tank cannot taunt Hamidon while he's phased, as long as nobody else is taunting him (and they shouldn't be unless they're dumb - in which case they deserve to die) he won't lose the aggro.
ps. having the tank team in the blob while there's nobody else in there will mean they WILL die. As soon as the turtle leaves the blob and moves out of aggro range, every single mito will start shooting at them. The only reason we were able to use this technique before was because we could use Phantom Army to take the mito aggro, but Hamidon and the mitochondria can kill them now.
Edit: I just remembered that Hamidon also damages people in phase shift, which I guess applies to Hibernate as well. Nonetheless, the regeneration boost is still more of a help compared with the other tanker tier 9 powers.