Hey my names Ahren. I just want to say i have not you giant heal for along time.. I tried out my own strategy.
22 lv 5 giants
7 lv 5 wiz
10 lv 5 wb
10 lv 5 goblins
2 level 3 healers.
1 level 5 rage.
So first off i find a base that has a decent amount lf gold n elixer or alot of DE. First thing i do is place one giant on the side of major loot. Than if its clear i spam them all around the area.
I place a rage spell inbetween the walls and towards the outside for my wallbreakers. Id say 2-3 at one time than place your wiz in a line and place healers n than wait to see if you have a shot with your goblins to the middle.
Ive either gotten 50-100% everytime and this only takes like 40 minutes to train and if you get the pattern down one rage should be ready after every wait. Good luck! Its a really good way if you boost your barracks!!!

-Ahren