There is no great way to defend at th8 in war, you are basically just going to get cleaned up later. But, wasting a higher player attack because you have to clean up the easy low stars is possible. I have found this base to be effective in pretty much all manners. Pekkas roam the edges the whole time unless someone is smart enough to GoWiPe, but even then it can go to the trash if they GoWiPe too close to the base tunnel. I strongly recommend it.