So I'm really happy with BLM, but the one ability that just seems completely out of place is apocatastasis. BLM is supposed to be about heavy nuking and has basically no buffs (except self buffs) so why does it have this one random one thrown on it?

SMN on the other hand seems to be built with the idea of being a support DD, similar to BRD, having eye for an eye, supervirus, Physick and battle raise.

So my suggestion is remove tri-disaster from SMN and give them apocatastasis instead to fit with their support style. And for BLM at level 40 give them burst.

Burst will be an ability on a 3min cast timer. It will be a buff with a 20 second duration. During the buff all thunders cast will have half duration on their DoT but will increase the thundercloud proc rate to 40%.

This would be good for times where the BLM has to move a lot for a short time. The thunderclouds would be weaker due to the shortened duration of the DoT so it wouldn't be too overpowered and an ability like this would fit the BLM job better than apocatastasis