Feast of Flesh supportability

Feast of Flesh skill granted by the Unborn Lich staff has issues with compatible support gems.
Corpse Conservation - Not allowed despite being a corpse consuming skill
Considered Casting - Allowed despite the skill not being able to hit enemies
Potent Exposure - Allowed despite not applying exposure

yup very annoying bug
clearly corpse conservation should work

sadly all of the skills from the staff are bugged all over the place and have gotten no attention

Winnowing Flame can not proc Raging Spirits for example and the grisly pyres seem to deal no damage