Originally Posted by
JoshK
I try and keep a spare builder to dump stuff into walls if you are playing very actively as of now your current description.
This is called efficient way of farming. Reasons:
1) You won't be stuck on maxed storages [maybe DE if your heroes aren't maxed]
2) Since now COC update allows elixir/gold dumping for walls which is a plus, you can dump 3m/4m into one wall when you're close to 7.8-8m.
The only reason I'd see you keep 5 builders busy is if you can't play a lot. Then fair enough. and have no time to farmed those walls.
Nb. trust me, level 10/11 walls are a pain in the backside to farm, requires a lot of playing imo :p