I seem to be able to take our pretty much any th6 base (even maxed) and under, I go for 20 giants, 11 wizards and 3 wall breakers. That should fill up the army fully, then I always bring 2 healing spells, and if I can, some wizards in my clan castle. I start off placing a few giants, let the mortars hit once (if they can reach, so they don't kill the wall breakers) then quickly place wall breakers so the giants can move in, put down a few wizards to clear the area and once it's clear enough put the rest of the wizards down and hope the best that they go through the middle, not around the outside of the base.
Hope this works for you, in my opinion it's the best strategy. Also, the attack should cost about 60k in total.