Thats just you. I can very well get the JPA to work. You probably just ain't doing it right. The Assault Marine is best utilized in hit and run tactics. You MUST choose your OWN engagements, in YOUR terms. Not the other way around. You kill one or two, drop a frag if you see a large group and get the HELL out of there. Then you rearm if you manage to get out alive and you get back at it again. In the meantime, you have to keep an eye on your fuel level. If you spam the spacebar like a maniac and waste fuel, youre as good as dead. You have to be mindful of that shit.