Top 3 powersets for holding aggro?

[machogriz]

So, I've heard that Ice/Ice is king for holding aggro, and I'm curious where each powerset would rank in holding aggro, both primaries and secondaries.

 

How would you rank the top 3 powersets for holding aggro?

 

Bonus question: Is there a powerset combo that is better than the sum of its parts for holding aggro?

[Android Nim]

ice/spines is aggro velcro

[Giocondi]

I think aside from Ice armor, you are looking for any set that has more than one aura to give it a leg up regarding aggro management. So I'd say Dark and Bio would be pretty good options both having 2 PBAOE toggles in the armor set, from their combine this with a primary that has another aura like Radiation and you are sitting pretty!