Originally Posted by
Junliang
Issue with "save them for last" is that most players do not plan their builder timing that well, as such they are left with these few scenarios
A) maxed out everything except tesla, then convince themselves tesla is not important and upgrade th before tesla maxed out.
B) leave 3 builders for tesla, but due to long upgrade time for tesla, no workers inbetween to upgrade walls, so some might leave a single builder free for walls, and wasting the builders time by not letting them work 24/7.