Armor type and HP comparison. Fleetships only.
Ultra light:
Parasite: 201,600 hp / ship (9.8M cap)
Speed booster: 8,800 / ship (0.7M cap)
Decoy drone: 200,000 / ship (1.8M cap)
Raider: 52,500 / ship (10.3 Mcap)
Microparasite: 78,000 / ship (5.6M cap)
Space palne: 29,400 / ship (5M cap)
So 200k max per unit, roughly with an average cap health of about 5.5 million.
Ultra heavy:
Spire maw: 2,100,000 / ship (10M cap)
Spire Stealth Battleship: 1,925,000 (9.6M cap)
Those are the only two. 9.8 million cap health with 2 million hp per unit.
Heavy:
Spire tractor platform: 2,100,000 / ship (10M cap)
Shield bearer: 1,260,000 / ship (30.2M cap)
Dyson gatling: 7,200,000 / ship (705.6M cap) -- outlier. I suspect that it's cap is 98 because it's effectively irrelevant
Spire mini-ram: 420,000 / ship (8M cap)
Not counting the dyson gatling...
1.2 million hp per ship average, 16 million cap.
You going to keep insisting that "light hull ships don't have fewer HP"?
The problem is that there will always be "more efficient fish."
Why would you assume that? Random variation practically ensures that at some point this will be the most efficient problem.
You're assuming an infinitely static game where only bug fixes and balance tweaks are being introduced.