Pyromantic Pact Bar above head

Hello ever since I've unlocked this skill and no longer use mana I'm dying and also finding it hard to not cap the infernal fire mana thing, not only is it bugged and shows grey/transparent making it super hard to see, but I have the Health/Mana bars turned on above my head, but since getting this passive only health shows.

My suggestion is can we please get an infernal (heat) bar build above head under the health bar where the mana bar would be, to see when to stop casting thanks.