Any successful 100+ strategy will have 1-3 bunkers in the middle (I use 2) with 5-6 units (e.g. 2x each of gunners, engineers, medics) above the middle line. The rest of the units (e.g. 1 officer, 1 scout, 2 spec ops, 2 snipers, 2-4 ATs) under cam nets along the bottom. Heroism everyone once they get two ranks and concentrate fire on dangerous units like mortars, bazookas and ATs. Medals help a lot, and lots of luck.
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