Seems to be errors within the pre-compiled version, had a bug with some spells while another member of this community that compiled it himself did not.
"Illumination" talent doesn't need to be crit to be activated, which makes every heal cost no mana.
Also heals now proccs "Imp Lay on Hands" talent, which they should not do.
(I'm using today's pre-compiled Mangos Zero Win x64 version)