Base layout

Hello guys.
I, unfortunately, am in desperate need of advice.

My in game name is sycorax, in the clan cauldronborn

I'm at town hall level 6, and trying to get 1250 trophies so as to get the sweet victory achievement.
I have 51 gems, and plus those 450, I'll be able to get builder hut 3.

The problem is, my troops suck, and my base sucks.
Archers, Barnarians: lvl 3
Giants, goblins, wall-breakers,wizards:lvl 2

All cannons lvl 6, all archer towers lvl 5.
Walls most at level 5, a few left at level 4.

2*mortar at lvl 2
2*wizard tower at lvl 1
3*army camps. 2 lvl 4 , one lvl 3
2*barrack at lvl 5. 1*barracks at lvl 7

I'll attach a pic of my layout.
I've been attacked, and lost, 3 times in half an hour.

I can't afford to set up a farming base as I'll lose trophies (currently at 1026)

Please advice me on:
1) A good layout.
2) Troops comb as for farming. (115 capacity)
3) which troops to upgrade.