Mashtuur- Hands down for strict infantry in vBF2, the two armors are not a distraction, and the two transports arent' threatening anymore. Karkand for the point whores and "easy" first flag owning, no skill involved. Sharqi for the the awesome scenery, but has the helos, with only a couple spots for the AA, but without the helos, this map would be the best for it is balanced otherwise.
Now if you want to go further in all expansions for best infantry maps. They are in order: Night Flight, Warlord, Mashtuur, Karkand, Harvest, Sharqi, Great Wall, Mass Destruction. For strict infantry, its Night Flight, there are no aircraft and no armor (one but no one uses it). And that map owns, Just wish they would make it a day map, or hell turn your gamma up and it is..