Quote Originally Posted by Aiurily View Post
this isn't good general advice. it's fight dependent/raid pace , and even in a 100% dummy situation it can be favorable to hold certain oGCDs for BFB window. +30% dmg is pretty strong
It's absolutely fight-dependent, but the general rule of thumb is to hit things on cooldown, assuming an infinite-length (or even just an extended duration) of uptime. Holding stuff to maximize for 3 minutes is fine and dandy, but if you try to maximize every 3-minute chunk by holding things to stack it all, you'll come out of a 9-minute fight with a significant dearth of dps.

You need to know the duration of a fight before you can consider how to shift cooldowns to maximize. If any adjustment causes you to drop a use of that skill over the course of the fight, that's 9/10 times a dps loss over just using the skill on cooldown.