I'd ask priestess Gut for help->she goes to her own room, then climb to the rafters, jump around a bit and shoot her dead from above. Minthara can be fought in her chamber pretty much hassle free since you enter from the only entryway there->no reinforcements. For Ragzlin I'd either climb to the rafters again, or go and rescue Halsin from the beastmaster or whatever to recruit his help for the fight. Of course you could at this point just go for a frontal assault. Beware of the pits around the hobgoblin though. He has a warlock whose eldritch blast can know you down.
