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I used to run this Aegislash...
Aegislash @ Sitrus Berry
Ability: Harvest
EV: 252 HP/ Rest split between Def and SpecD
Nature: Bold/Careful
Toxic
Sub
Kings Shield
Shadow Ball
It was the best bird spam killer, and the most annoying toxic staller ever. I stopped using it because it can easily be...
Thundurus does not get OHKO'ed from any of those birds at max attack. The damage calc isn't working right now... but a max attack banded brave bird from raptor only does about 75% to Thundurus, which then he can retailate for the KO.
EDIT**:
252+ Atk Choice Band Staraptor Brave Bird vs. 0 HP /...
I have been using this set for Thundurus with huge success. It works kinda like the popular gengar set, but can tear through suicune and catch chansey with superpower. Almost everything I have experienced is ohko or an easy 2hko. Thundurus can also take 1-2 hits from bird spam and retaliate...
Has anybody ever thought of banning unaware suicune? Thats the biggest threat in this metagame IMO. I find myself making teams specifically around beating it