It’s worth sacrificing the Tieflings to never have to interact with Halsin even once.
An option to make a deal with Minthara to hand over Grove in exchange for safe passage for the tieflings would be nice. She’s only after the thing and shouldn’t really care about a bunch of refugees.
Another option for people who want to be a bit evil without going full sociopath. Although since the druids leave their own defenses entirely up to the people they are trying to kick out, they’re kind of asking for it. Cowards.