[Mobhack]

Standard buy for me is a few support HMG sections in WW2, since the AI then likes tank riders. Used to hose down any clusters of tanks and watch the damaged infantry fall off them...

Also, since HMG units are a moderate priority for the AI (as with ATG, ATGM etcetera) for plotting its arty calls, they distract his arty onto stuff I dont really care much about (and have positioned well away from my core!) - so I get information as to where his on-map mortars are hiding.