Ninja star: A TH6 hybrid base
http://i61.tinypic.com/2h7fm0p.png
This is my current base design after quite a bit of refinement.
It has prevented Th7's and even TH8's from 100%
Basically the idea is to have 4 outer compartments each with a spring trap, when a group of giants is used they need to destroy all the towers in the current section (while getting focused fired by most of the towers in the base) and then break through the corner block to reach the next section.
This repeats 4 times before the enemy can finally get to the core unhindered and take any resources.
After they defeat the main section, they still have huts in all corners and that one giant bomb up top that has saved me from 100% once.
Some defence logs-
http://i62.tinypic.com/29xvg9w.png
http://i61.tinypic.com/2m4yjyf.png