Hey guys, my guild just got to 10 man Council the other night and really struggled to kill Sul before he empowered despite lusting off start and focusing him as much as possible. When I looked at the logs one of our locks was pretty low, doing anywhere between 50-70k DPS over our 12 attempts. I don't think it's gear, he has 499 gear score. Before I confront him I was hoping to get the opinion of someone who knows far more than I do about Warlocks or DPS in general (I played Disc priest).
Our strat was to simply lust, burn Sul then switch to Frost to and break his empowerment, back to Sul until ~50 energy or so on Kaz ect. Our Monk, Shaman and Mage where in charge of killing Loa Spirits so i don't think that should have hurt his DPS. Any advice would be greatly appreciated so I can either get off his back or bring him some constructive criticism rather than just simply telling him to improve.
I'm not yet able to post links but our logs are available. Guild name Long Story Short, US-Server
Locks name is "Deadlockk"