It depends on the level of the goblins (I'm assuming your maxed out.) I always take 3 upgraded rage spells with me and a few upgraded wall breakers. If it looks like one the gobblins can get trophies from it, I got for it and use all my rage spells. Otherwise as the last poster said you'll have some trouble working around certain troops. In order to not fall too many trophies, and find myself in with people who have very little resources to raid, I'll do some goblin runs and then reconfigure my troops and do some regular attacks. That way you get both of what you want, decent elixir and keeping your trophy count up.