Farming base? And what to upgrade next?

Hey guys, I'm finally back in forums. And active in game after giving up for at least a year.
I'm still on TH8, but I'm having trouble finding a good farming base.
Also what to upgrade next.

Mortars: All level 6.
Walls: level 6.
Wizard towers: All level 4. 2 of them are upgrading to 5.
Air D: All level 4.
Cannons and Archer towers: All level 9.
Troops: Barbs, Arhcers, Giants, and Wizzies at level 5.
Rest level 4 except for balloons(don't use em.) healers(never tried.) dragon(Don't use either.)

Ugh. :c
I'm getting heaps of loot from barch though!

I'd definitely upgrade the wizard towers to level 5/6 as soon as you can because the splash will help a ton against farmers. Not sure how many builders you got but, as your getting those wiz towers up, use all excess gold on walls. Level six walls wont cut it in the later stages of the game. I'd also do air defense after the wiz towers. As for your troops I'd personally start upgrading my balloons and healers, because healers are great for cheap giant/healer attacks and balloons become a powerhouse at level 6, so its good to get them up early.

Like kdogg I think you should upgrade your wizards towers to level 6, expensive but needed, ignore cannons / archers towers for now. Level 7 walls are 'easy enough' to achieve.