Need help upgrading walls
I am kinda new to townhall 8 (been 2 weeks) and i need to upgrade my walls, i have all level 6 (pink ones) and some level 7 (purple ones). My goal is to get them all to level 7 cause i want to have some level 8 walls before upgrading to townhall 9 (going to max out all defenses first so this will take a while). I have 4 builders that are constantly working on defenses or mines and pumps. Any suggestions or tips on how to level up my walls quickly while upgrading defenses? Thanks! :)