I am in crystal 3 and I mainly use balloons and minions or dragons. Dragons are obviously way better but really expensive. I believe I use 34 balloons and 15 minions.

I use 100 archers, 80 barbarians, and 10 wall breakers and it works well. I am in Silver 1 though.

I use 16 Giants (lvl4) 2 healers (lvl2) 18 wizards (Lvl3 upgrading to 4 atm) (3 lvl3 wall breakers) and the rest lvl 4 archers

Town hall snipeing a load of barch

Giant/Healer isn't a very effective strategy if you ask me. I'm working on maxing TH7 and here is what I use:

Farming:
Barch (2 barracks always full of archers, 2 full of barbarians)
Works very well in Gold 3 - Gold 2 as long as you are patient when finding a base.

Clan Wars/Trophy Pushing:
Mass Dragons and 3 rage spells (more expensive)
24-28 Balloons, 3-5 barbarians to lure enemy cc, rest wizards/archers, dragon in cc (very effective and less expensive but takes more skill and harder to master)

Hope this helped you out!

Use Barch (Barbarians and Archers) I use around 70-80 barbs and then 8 wall breakers, then the rest archers.

It works really well for me. Of course you could take some archers out and put more barbs or wallbreakers or anything.

I use level 5 barbs and archers and have barched up to crystal II

I'm in the same position as you and this is what I use and have good success:
109 Archers
15 Goblins
12 Giants
8 Wall Breakers
2 Healing spells
1 Rage spell