Have you looked at the True AI and Mechanical Body passives in BC79? Other than that, I've seen people making lower PL versions of their mechs to represent themselves as fighters outside the cockpit while still using the mecha rules.
Viewing post in Battle Century G Remastered comments
Well now this is just pestering you, but I'm conflicted. I noticed the Psycho Rival build reccomends possibly swapping the Beam Saber and Beam Rifle for an Extending Blade and Charge Cannon. I know you can't target your own remotes in duels, but does that apply to explosion attacks? I suppose you can't hurt yourself with your own blast attacks, and your remote is just an extension of its user, but I'm not sure if that's right.
With the caveat that it's been a few years so I'm not 100% sure what the underlying logic was, I think your Remotes are spared from your own friendly fire. Also, if you're using the Psycho Rival check down in the comments for the fixes for some of its levels, as the math had a few mistakes in some builds and that was one of them.