Corruption, HoG x2, Doom still beats Affi single target. With SF, DL or ToC as your filler...
Destruction > Demo > Affi
Demo makes a strong case for being just as or more competitive then Destruction.
Agreed, demo is super strong 1v1, esp in versa setup. Sadly in team fights, destro really excels beyond the other specs for the kill potential alone. Since this list is mainly considering wsg, I'm not fully sure where to place each spec.
In big fights, I would say that demo might be the weakest of the three. Spread & AoE damage is definitely decent, especially since you can stay on the move with all the instants, but in terms of how you are actually helping the team, you would be hard pressed to keep up the damage while also reserving HoG for full roots. Doom on the other hand does mean that you are keeping rogues out of stealth for a long ass time if they can't get an absorb up. However, 9ish seconds between ticks is definitely doable to get a restealth and reopener off for rogues with >2 brain cells. Then again, if specced into Drain Life, DL definitely adds pressure, especially when you have all your dots up on a target PLUS you can demo leap to either get back to the fight quickly, or to retreat effectively - something which the other 2 specs cannot do very well without alot of downtime.
Affliction tends to stack alot of haste so in larger fights, the spread UA and super fast (arguably undispellable) fears might make them more of a team player than a demo lock...
I don't think anything needs to be said about destro since everyone knows what they do, especially when they are doing it well.
I'm still torn. Maybe demo needs bumped up a tier and a note added about their solo-potential, but keeping the US Meta of how wsg is played in mind (it's definitely a different situation in EU) then I would say the current rankings are pretty solid.
Sorry for just typing a post spewing my thought process on the topic rather than a more clear end decision
