So I put the Plump Helmet Man through a lot of tests in the arena (after removing the Arena restriction).
What I have determined about this body structure and make-up:
Worthless, but occasionally too difficult to kill.
Now, a plump helmet man has a very simple body structure, and they're composed with the same physics stats as wood.
In testing versus naked dwarves:
Naked, unskilled wrestling: The Plump Helmet man actually gained skill at a considerably higher rate than the Dwarf (reached Legendary first, amongst other things), however, was immediately established as the eventual loser in the fight. Within twenty pages of combat, every part of the Plump Helmet Man was broken, but it still took another hundred pages to actually kill it. The dwarf became modestly injured in a couple of places.
Naked, one-on-one with short swords of native copper (combat balance modded, no less):
Bisected in one blow.
Naked: ten-on-one with short swords of native copper:
Weren't able to scratch the dwarf.
Naked, legendary ten-on-one with short swords of native copper:
The dwarf became modestly injured, as it slaughtered its way through the ranks.
Naked, sword'd-on-wrestler:
Managed to kill the dwarf. Albeit poorly.
I decided not to bother testing clothes and armour.
This brings me to a central question, however:
How should one compose a creature of plant matter, such that it has similar durability and combat ability to that of the primary races?
Seperate question:
What are the spheres for religion and symbolism and such? Are they just the ones in Language_SYM ?