I recently put my TH8 to upgrade and it has about 6 days left but I timed it so that I wouldnt have idle builders. I have 4 builders and two of them are on archer towers (to lvl 10) while the third is on the barb king (going to lvl 8). I get a free builder In a couple hours and I was wondering whether I should send my king to lvl 9 or an archer tower to lvl 10. If I do end up upgrading the kibg then I'd have a lvl 9 archer tower on TH9.

