yep Xibor there has to be a line of course. Since i made the first post many things have changed.
With COA gens saving troops, and i guess gen skills saving some more, combined with recruit guide buffs . Maybe not needed so much. Certainly i find i can easily run 2 x woodcutters / day without running out of troops. As long as i keep skunks running most of the time.
I have seen suggestions for buffs, rather than a whole new building. Might be a better idea in particular if its using stuff you have plenty of at lvl 70 + . Such as granite, grout, beans, exo wood, plat ore (7 mill in star and counting)