Great work already,
I noticed a lava crater in the decals in the tile editor... any way of hooking it up to a fireball? so you create on target/change tile under target to lava crater? Or add a "blasted" effect for a few turns to target and make that a seperate spell that changes the terrain under target or has a persistant particle effect (like smoke?)
Atm though I have low framerates in tactical battles and it prevents any actions until the entire animation is complete... so death animations are agonisingly slow with no indication of when they're deemed 'definately dead'
im actually trying to modify the tile in tactical battle, but no luck so far, they seem to only work in the strategic map, i will look into it some more 
and ye it is a problem to have long particle effect if you have low framerate, maybe you should stick with the original effect since they are much faster and not so heavy
