Hmmm..."next two turns"? Better just say "triples the recast of the next action used by the monster".

Time mage might come,but you can forget about its signature nukes. Demi would end like Diabolos in FFXI...it can cut the monster HP but actually never lands on big stuff because absolute percent HP cut would be too overpower.

Also, time mage also uses staff...so maybe a "Clock Pole" would fit it better.

About traits, would be easier seeing something like fastcast or one that increase casting time in exchange of increased overall spell effects/duration.

MP dealing isn't time mage pattern...its SMN. SMN would have stuff like traits for faster MP regen, increased MP pool or reduced MP cost of spells...so, in short, time mage deals with cast/recasts/duration and SMN with MP cost/regen/pool. But, of course, i'm using other FFs as reference for these patterns.

Meteor is valid tho. It can work similarly to CON ancient magic, so you cast on self and go walk while the casting isf finishing so you can go to a spot where the spell would hit as many opponents as possible.