this is probably the best advice on the subject. While many different ground troop combos work well, the huge benefit to balloons + minions is that it is an incredibly simple army with pretty much the exact same attack strategy for ever base. I've been using Balloons, Minions, and sometimes Hogs and a couple dragons mixed in. Balloons + Minions has gotten me from 1600 (Where I was farming) to current trophy count of 2464.
24-28 lvl 6 balloons, and the rest minions. 1 lightning spell for cc troops, 3 rage spells (only need 1-2 rage usually but having all 3 available can save the day sometimes). CC holding air troops, hogs, or pekka (archers / wiz work but walls get in the way).
step 1) pull archer queen out and kill her with a few minions or cc if archers.
step 2) activate cc and pull out every troop. Stack them all up and hit em with lightning.
step 3) place bloons in a line where you want to clear a path (close to TH, near wiz towers, air defense, inferno towers first to take them out fast).
step 4) place rage where bloons will be in 1-2 seconds so that they quickly sweep through defenses. Place more rage as / if needed to keep bloons moving quickly.
Step 5) pick off any buildings undefended with 1 minion (similar to using archers) and once a path is cleared to the TH (with no danger of splash dmg) send in minions in 1-2 waves. >>WATCH OUT FOR AIR TRAPS - they will kill all mnions at once if they're all close to one<<
Step 6) use king / queen if needed for last % (try to save these in case you fail to kill the TH and need to pick off more buildings quickly to reach 50%)
Plenty of videos on youtube of people using this army. If you like, feel free to check out my videos:
http://www.youtube.com/playlist?list...RjVVYqWJpZDF_K
People use this army all the way to champion league top ranked players in the world. Vs a maxed out base you will only get 1-2 stars most likely, and vs a base with poor layout or easily killed splash / air defense you can easily three star.
The main thing to keep an eye out for is splash damage and air mines when sending in minions. They are great for cleanup after bloons but super weak so they can easily all die at once if bunched together.