The forum is a drug, so I relapsed...
Anyway, please understand that I have not attempted Sherbet towers since the addition of teslas, but I assume the strategy is the same. It's two choices when it comes to spells. Either do three lightning (three level 4 lightning kills a level 7 mortar), or my favorite, two rage and a healing. Composition includes 10 goblins, 20 giants, 80 archers, and 2 balloons.
Deploy gobs near the center to deploy springs, bombs and teslas. If you used three lightning, kill the mortar. Deploy a rage spell and 10 giants on one side to kill the defenses. Deploy the healing right in the middle and the other rage and 6 giants on the other side. This should take care of the central defenses. Then deploy one giant on each wiz tower as bait, and then deploy 10 archers to kill the tower. Deploy the remaining archers on top to kill the archer tower. This should take care of the defenses that target air. Then deploy the two balloons to clean up the mess.
Hope this helped!

