Working on my mod...I got frustrated, and started reading....many text entries made by others.
Educational.
I found how skullspikes (etc terror) REALLY work, related to an armed slave. Testing with a slave using "wood" confirms.
Should be safe (like smoke launcher), but it has the same effect as equiping a slave with a knife,
If you see my user page, I have tried to detail some of the fix.
I can supply all sources and the files I have created (from scratch).
Aazard
PS:
I have taken the liberty of creating a set of "entry level" wooden melee weapons (blunt and sharp), geared specifically to slave (& gladiator) use.
Both are a rough equivalent to using wood as a weapon (approx. 5DPS, 7.5 AP...blah blah).
Cause terror (0,25, offsetting being melee armed entirely), contains art of the terror type > beauty (base x wood) of -5 (like terror sculpture), radius touch/4
Much better.