I'm not a big fan of having all storages together like that in the centre. If they breach the centre then chances are they've got everything. If you spread storages out across the base, then it is harder to get them all. I wouldn't bother putting all your collectors inside the walls either.
Try having a look a this site if you haven't before for Farmer style TH8 bases http://clashofclansbuilder.com/
Try having a look a this site if you haven't before for Farmer style TH8 bases http://clashofclansbuilder.com/