Under normal circumstances 70 seconds is sufficient time to obtain 10 stacks of the
Stolen Time (T13x4) buff, ensuring that your next
Combustion will likewise be available in only 70 seconds. However, on Heroic Yor'sahj this is not the case. Even though it is critical that one has
Combustion available for each and every black phase, which occur every 75 seconds, it is difficult with a normal rotation because you are forced to
Scorch while running alongside and DPSing the incoming oozes.
To address this I throw out 2-3
Arcane Blast during each ooze phase, usually 2 on the ooze and then 1 on the boss after the ooze is dead. It stacks the buff more rapidly than
Fireball and eliminates the chance of the buff stack accidentally falling off.
Certainly, this is a DPS loss, at least on the oozes. However, the difference is easily made up by having
Combustion available every single black phase as 5/6 of them include a black ooze that is never killed, meaning lots of
Forgotten One adds for you to spread
Combustion to.