One thing jumps out is that the Air Defenses in the inner ring will draw Hogs to the core. At least if they are in the bottom half of the base.
Hows has the base worked in Hog attacks?
[IGN: Racer X | TH10 | Current level: 147 | Lvl 11 Walls: 014/275 | Gold Grab: 1.164 Billion+]
I just made it...so figured id get some tips, make a few changes and see how it does, but figure if I get good tips, touch a few things up than see how it does...Havent been offline since making it