I think druid is one of the only things in the game that can feasibly win a battle of attrition against stsf d-elf, and if he's using spores to keep stsf from charging up it's definitely working in the druid's favor.

HOWEVER. I wouldn't use spores if I was going to all-in raid at the inners. I'd use spores and thornheart, then flee and just...wait. Homie has to either come out and fight or eventually quaff home. Then easy peasy raid.