I made a small mod that make all MEX´s strategic icons always on top of others and I all so separated strat icons of t2/t3 MEX and t2/t3 mass fabs (possibility to do it with t1 MEX and t1 mass storage)
(I wonder why this was not done, it is just simple change of one line in blueprint and very usefull to easy see eco )
btw. mod need Advanced strategic icons.nxt in C:/ProgramData/FAForever/gamedata
all MEXes in pictures are surrounded by mass storages