Generally you'll only get 4-5 GCDs on a conflag. Best dps is Disembowel->True -> Vorpal -> Full. Just prep the Disembowel with an ID on Twintania as the conflag goes out, and make sure HT has been recently refreshed prior to the conflag cast. oGCD abilities will depend on whether it's a burn conflag or not. You don't need any, other than leg sweep and a jump if you want, on regular conflags, and blow half your cooldowns on the burn conflags. Feel free to Phlebotomize a regular conflag after Disembowel if two dps end up inside.