WiGoBat

Place two each of ice golems, wizards, and witches on either side of where you want to funnel, and use the wall breakers to get them into the base. Then, place the remaining ice golems, log launcher, witches, and heroes in the same area. It is best to place the log launcher so it'll destroy the eagle artillery. You'll probably want to use the warden's ability shortly after entering the base. Use your rage spell once the log launcher breaks and the troops near the town hall. Then, on the opposite side of the base, place a freeze spell and all the bat spells on a wizard tower, and use the rest of the freezes on the other wizard towers as the bats near them.

This strategy is very effective on high-level (even max) th12s if they have single-target infernos.