Damage test
I did some testing on these before they disappeared. Skip to the bottom if you don't want to read all the calculations
First try was with Shogun+6a. 6a didn't decay so we can rule out Burn and Penetration.
I took two hits, for 23.2 and 12.7. The Harness decayed 1.540 PEC which corresponds to 20.0 damage absorbed. The Arms decayed 1.323 which corresponds to 17.7 absorbed. We can see from this that the larger hit must have been on the Harness, so the two hits without protection would have 43.2 and 30.4.
The 20.0 damage absorbed suggests that the damage is 2 out of 3 of Stab, Cut, Impact (since Shogun protects 10 on each of these).
Next I went out with Goblin unplated. I took two hits (18.0 and 33.3). Shin and Feet both decayed 0.822 which corresponds to 12 damage absorbed, meaning that the total hits would have been 30.0 and 45.3.
So it appears that the Goblin is using all of the possible 12 Impact protection, which means that Impact makes up at least 40% of the damage. (12 / 30.0 = 40%).
In unplated Gnome I took a hit of 22.4, with 1.077 decay, which corresponds to 15 damage. So Gnome is using all of it's protection here - 11 Impact and 4 Cut. So we definitely have Impact and Cut damage included.
Now going back to the Shogun data it looks like we can rule out Stab, so it would seem likely that all of the damage is from Impact and Cut.
If we look at the hit on the arms, we now know that 10 Impact was absorbed, since we know that Impact does at least 40% and 10 is less than 40% of 30.4.
So the 17.7 absorbed must be made up of 10 Impact and 7.7 Cut, and this 7.7 Cut must be all of the Cut inflicted.
7.7 / 30.4 = 0.253 so this means the Cut is approximately 25% of the total, and the rest is Impact.
Therefore I suggest that Boorum Male do approximately
75% Impact, 25% Cut.
Notes:
I consider this a rationale, not a proof, at the moment. If we can rule out Stab, Acid, Electric and Cold, I will be happy
I was getting mobbed by several Boorum at once so I can't give any maturity-specific data, except to say that the hits all came from low maturities (Outcast, Bandit, Guard, I don't think anything higher than this but I'm not 100%).