what is the best soldier at high exp? gunner. the gunner: he will engage multiple targets in seconds, but he cant throw grenades. hint: to get a soldiers rifle skill up keep giveing him "ranger training". a soldiers rifle skill will go over 100 (iv'e had soldiers with over 200 rifle skill). officers gain rifle skill much more efficient than regular soldiers with "ranger training".
best soldier in my opinion is the gunner. I get one with lvl 100 exp every game. they will chop wave after wave into pieces. engageing multiple targets in sequence.
the new 16 barreled rocket launcher is cool, but you have to hit a enemy dirrectly with it. whitch is hard because its bad accuracy. needs better kill radius.