Lighthouse bosses

[Sove92]

Casters can't DPS him with dispose going, melee can't when math is up

All casters, with the exception of RDM, have instant cast GCDs always available (and even RDM can get GCDs if their manas are good, they have swiftcast etc.). It's not going by the rotation but it's better than 0 dps. Math isn't a big loss for a melee, because you know, you don't need to stand in the circle the entire castbar.

[Rongway]

Eh, I think they are slower because the bosses force a lot more downtime through movement and invulnerability phases. Construct 7 in particular. Casters can't DPS him with dispose going, melee can't when math is up, he stuns and transports people in his add phase, and he spends a lot of time offscreen with rushes.

All casters, with the exception of RDM, have instant cast GCDs always available (and even RDM can get GCDs if their manas are good, they have swiftcast etc.). It's not going by the rotation but it's better than 0 dps. Math isn't a big loss for a melee, because you know, you don't need to stand in the circle the entire castbar.

Even superpowered Dispose is slow enough that a RDM can stop to cast if not caught unaware by the mechanic.