You know, the best way to solve it is to do what I did - do away with the whole nexus idea and use the Red Guard logic to make 5 infantry units instead of 1 whenevr you build an Angry Mob. Give each of those 5 units the BuildVariants = tag like the Technical to make each ones appearance random, and voila - you build 1 Angry Mob, but get 5 different looking infantry every time, and your problems with Tunnels, Transports ect are gone
