I can live with that - maybe poison spray as produce flame seems like something they'd avoid at all costs...Hmm, D&D Beyond says toll the dead isn't SRD but part of Xanathar's Guide to Everything. Perhaps we should swap it back to produce flame or use poison spray instead, as that's definitely SRD.
I like adding charm person and ditching faerie fire (1st lvl spell)
ok maybe flaming sphere but is a greenish hellfire and deals necrotic rather than fire damage? (especially to confuse rules boffins )
looking at circle of lost now....undead wild shape seems a bit pointless. Spells are good though