Late response but I'll see what I can take from planet Fist. The mercenary-themed solo rpg game (that may take inspiration from Armored Core, Escape from Tarkov, Ace Combat/Project Wingman and Gray Zone Warfare) will likely use Planet Fist, Fist, Apocalypse Frame, After\\Burner and Edge Zero Force. For the reassembly, I could say that its more grunts running into the fray.
Thanks for your response! Though I have one more question:
3) If there are other games that you recommend would compliment well with Planet Fist (and assuming using the same sort of systems as LUMEN/PBTA/FIST)in mechanics and perhaps theme, what would you recommend?