I always consider myself as a front line forward pusher....
Then I played
RFO as a Bellos armor rider (pilot) so I know that I am horrable at foward-push, I always get too far ahead during war and forced to eject myself from the mecha before it blows up. However, I found myself doing a lot better when I switched to long range equipment on the mecha supporting the front line.
I guess I will be one of them grunt with a 320mm canon in the back looking for things to shoot that is pissing off our front line, or shooting at Shin while maintaining distance since I hate Shin so much... only if I don't suck at melee in mecha