I just found some cool stuff about Tornadus-T that makes choice specs more viable than life orb:
252 SpA Choice Specs Tornadus-T Hidden Power Ground vs. 252 HP / 224+ SpD Jirachi: 150-178 (37.12 - 44.05%) -- guaranteed 3HKO after Stealth Rock
252 SpA Choice Specs Tornadus-T Focus Blast vs. 248 HP / 232+ SpD Rotom-W: 122-144 (40.26 - 47.52%) -- 5.08% chance to 2HKO after Stealth Rock
So yeah even its counters can be defeated if you a choice specs.
%CoolStoryBrobat: Crobat's my 2nd fave Poke