I run fuel regen on all my builds because I hate waiting for it to recharge. Jump in and after about 2 swipes your fuel has already recharged. So it is viable imo. I do agree with using swords because speed is essential. You can cheese with a smart pistol as well using overhead jumps but that's pretty lame tbh. But if you wanna improve your own skills I'd recommend a normal bolt pistol and using it to finish off low hp enemies mostly. Lastly, if you're new to the melee system, you might wanna practice some more with a shield bro, jump assaults require a bit more finesse. There's usually a few players in the lsm garisson clashing about as well.