Talk:Units/@comment-114.198.71.4-20120818113109/@comment-101.108.237.109-20120818145944

You shouldn't spend on any since you would get 2 Flame troopers (which is a better version of dragoon, although they deal different kind of damage but it's pretty much the same). You could also get the mortar at the very beginning quest of the game. So just save those nano up for good stuff like Super tank and limited time units.

You could also get the Commando and Bazooka team when you're level 22