Originally Posted by
xxalucard
Fights where the boss physically "jumps" out of the arena (twintania divebomb phase, titan phase jump, ifrit charges, garuda teleport) or you happen to get "imprisoned" (conflag / fireball, dreadknight stun, granite gaul), will lead to portions of the fight where you are gaining more MP because you physically cannot cast any spells on the boss for a certain amount of time. If you happen to aetherflow right before one of these sections, and then aetherflow again soon after, that's a huge MP gain where the amount of MP you have doesn't necessarily reflect the amount of DPS you're doing.