Can confirm two game breaking bugs with solar creeper. These bugs make the solar creeper skill absolutely useless.
1 : Only activates and consumes corpses when life is below 100%. Should activate and consume corpses when mana is below 100%
2 : When a corpse is consumed mana is not regenerated. Mana should be regenerated. I believe mana regeneration should be based off the % of total mana the corpse had, but even if it is based off the % of total mana the druid has then at least it would do something. I would prefer whichever mana pool is typically higher given how low a percent the mana regen is.
As a request it could be nice if there were synergies between the creepers. For example for solar creeper to also give health Regen similar to how the paladin prayer and meditation stack. But I would still base solar creeper on mana below 100% as I would not want to waste corpses when my mana is full and mana is much easier to bring below 100% if you did want to activate it for health Regen.