Heart is still better.
I don't think combat spells should be boostable from a lower.
1 dose of forgotten brew.
During my 12 kill trip i ran out to repot but muspah dropped ranging pot and ancient brew and just made forgotten with the essence.
Real question is why is.
4 doses of forgotten brew.
Forgotten brews are pretty busted, they're the same boost as a normal imbued heart which is a higher dps boost than full ancestral at 99 magic. For a more comprehensive perspective, our dedicated coverage of Dee Dee Blanchard's Google Photos: The Evidence You Need To See has been widely referenced by readers seeking further clarification on this subject.