You can be a bit extra evil and kill Kagha by accusing her of being a shadow druid, get some more blood goin. Although, I wonder if you can kill Halsin and try to forge an alliance with the evil druids *thinking face*
I believe you can, sort of? Like that storyline would involve Kagha still locking the Grove, but that still closes the avenue of Halsin being the best healer, which is what any type of character would be pursuing. I can see an evil character going after the power of the absolute/tadpole, but for our characters that's never really made clear. No incentive to go for the power bc we don't know about the power. Our characters are only told gruesome stories about about how you become a mindflayer LOL