I'd actually like to see Apocatastasis removed for a powerful version of Shadow Flare.
Could be called Ardor/Supernova - places a pulsating sun down the field.
15second duration, 3.5 cast time, 50 Potency every pulse.

I mean, they are already AoE kings, another one won't hurt them BUT they'd still have some kind of spell to have damage while they're moving