aramis erak
Legend
I am going by memory here, but I think fighters also had better then specialization... Mastery made it +3 attack +3 damage, high mastery gave you something about initative... and grand mastery gave you a die code increase in damage...
Even Skilled often grants different damage dice in the BECMI weapon mastery system, not just grand master.
Only basic skill is base damage without extras.
for example the "Sword Normal" is a d8 base.
at Skilled, it goes to d12, –2 AC bonus vs 1 opponents, plus 1 deflect, and disarm.
At expert, it goes to 2d8, -2 AC vs 2 opponents, plus 1 deflect, and disarm @ +1. And it can be thrown.
At master, 2d8+4, -3 AC vs 3 opponents, 2 deflects, and disarm @+2. Throw range increases
Grand Master, 2d6+8, -4AC vs 4 opponents, 3 deflects, and disarm @+3. Throw Range increases further.