What Tactics Are Best When Playing the Underdog?

[Weasel]

What I do is set up a relay. I will buy a motorized or mech company, and then buy one or two leg companies. The mech company will be in the front and will advance to contact. Once contact is made I will dismount and send the apcs back to pick up a leg company and bring them forward, unload them and do the same again. A thing to watch for is to make sure the apc/truck can carry the size of a leg squad. So I will buy a mech company and deploy behind it the leg companies; and do the same for the other mech companies.

While the mech company is moving forward the legs will march until picked up.

Now I don't do this all the time; if the game has lots of points then I will probably buy more mechanized companies and a couple of legs to secure the flanks. If lesser points then I will do the mix described above. But it is a good way of increasing your infantry on the ground without spending points on vehicles with useless HMGs on them.