Flurry, Rage, Melee Power Stance, these are the best attack skills for Man-At-Arms. Crippling blow, eroding strike and draw blood are not nearly as useful, I think.
You will want both if you play a melee fighter. They do the same thing but WHirlwind causes more damage, use one then the other if anyone is still standing.
Well the whirlwind has bigger range too.
Anyway, we could elaborate about usefulnes of Man-at-arms skills.
I would say:
1. Ram - the best skill ever
2. Crushing fist - very usefull
3. other skils
4. useles skills: Eroding strike, draw blood, power stance, ...
