Leave current level blank or 0 if you don't own the ancient.
Efficiency indicates switching all gilds to the indicated hero, and includes the 80 souls lost for each regild.
Tinkering with gilds will not automatically account for the souls lost to regilding.
Efficiency indicates the relative value of the relic. The relic with the lowest efficiency should be salvaged.
Sorry, optimization doesn't work when more than 5 relics are present currently.
This plan begins after all heroes are unlocked and all upgrades are purchased up to and including Frostleaf.