Just as an amusing aside:
We already know that it's unavoidable to lose Wyll if you side with the goblins, and fairly easy to Lose Gale as well,
Funnily enough, it's actually so badly hung together, design-wise, that this is maddeningly simple to circumvent and creates complete non-sequiturs. On my most recent playthrugh, when I tested the minthara branch briefly, I engaged went to her with Shadow, Lae'zel and Astarion in party, and helped Minthara assault the grove, then agreed to meet her there... I returned to camp, swapped in Wyll and Gale, who had not objected due to not being there, and not left me, and then went to the druids, where I promptly betrayed and slaughtered them, with Wyll and Gale standing alongside me, and then doing most of the druid-murdering heavy lifting, with narry a complaint from either of them the whole time.
