Is builder #5 a waste at th10?
I'm a mid th9 with 4 builders who are almost never idle (maxed xbows/mortars/CC/most troop upgrades, half maxed on cannons/WT/tesla, one level to go on each AD and AT). Mix of lvl7 and 8 walls, AQ10, BK11. I don't plan on spending money for gems, so somewhere near the beginning of th10 I will hit Masters and finally have enough gems to buy 5th builder through achievements. At that point, is it worth it? Or should I just save gems to boost barracks when I try to make a cup run?