Current comp getting crushed

I have been using a current army comp of
14 level 2 giants
5 level 2 wallbreakers
10 level 3 wizards

And my giants always tend to get destroyed in the intial attack leaving my wizards easy targets. I usually put down all of my giants at once and send in my wallbreaker; wizards are sent in after like 10 seconds

I should also mention that I will hit townhall 7 in 2 days, so should I just wait until than to figure out my comp?

Another edit :p - how would you attack a base like this as townhall 6/7 https://drive.google.com/file/d/0B0q...ew?usp=sharing

Do you have healers or heal spells yet? I forget what th6 is like. If you have that i would use giants under heal to kill defenses and archers behind them to help and clean up.

take 15 giants,4 wbs,12 wiz and rest archers with lvl5+ hogs in cc and all heal spells.This worked for me as charm

Upgrade giants lvl 2 is too weak

Yeah, I am up to level 3 giants now

I did this and it worked good (mostly):
1barbarian,15 giants,2wbs,13 wizards and about 30 archers.
In the clan castle: Giants(lvl6+) or hogs
Spells: 2 Healspells

Remind that is a maxed troop strategy.
Try for yourself I used it for some farming attacks but mostl for 3* Attacks.

For war:
When my mini was recently TH6 the strongest attack I found was 50 archers to kill the CC, usually a dragon. Rest all loons with CC max loons. As a TH7 you are going to have to start identifying weaknesses in the base to decide what to use, but I find hogs highly effective.

For farming: barch, no discussion needed here as it speaks for itself.