Not really sure what the complaint is here.

Companions cannot be grouped separately? If you're talking about in battle, they can be assigned to formations. If you're talking about clan parties, well, they're your companions, so they stick with you. AI clan parties behave like every other NPC - they only get a party leader.

Troop health starts at 100, but gear plays a factor in damage reduction. There are a handful of perks scattered around the perk trees to increase troop health.

Yeah, keep dreaming. They can kiss my money goodbye. I will never buy whatever they flaunt at my face anymore ever