balanced defense atack in th 7

It is another must.
untill th7, you make a full dragon atack with 3 thunders. and do 3 stars.
You need to do something for better defense in th7.
From th8-10, it is almost impossible to do 100%. So I beleive it is not balanced ( Defense vs atack)
Maybe give th7 another air mine, air bomb, i dont know.

TH 9 and 10 wouldnt bother raiding you as you would have no loot available to them. It would just be a waste of time. If what you mean is 3 starring TH 9 and 10 being a TH7 then might as well have the TH2 3 starring a TH10