I prefer using a shotgun... even though the delay has killed me many times, I use it to provide support fire for teammates. For solo, I usually get close to the opponent and run circles around them to mess with them and then get a point blank shot with my shotgun... point blank shotties hurt like hell
. My speed doesn't help much either(heavy infantry). But mortars are important to win over a base on the arctic planet(kills people, blows up mine fields). I just have problems with really fast scouts with dual appirces.