Abilities and Skills

I have been coming up with a few concept ideas for defence and attacking in my game. I have come up with the completely original idea of a force field, however, this force field won't be in front of you but follow behind you. This would make the player strafe away from incoming attacks. It's not only interesting gameplay but original.

I have been playing with the idea of different types of arrows for different types of enemies. The blunt arrows will be for enemies with helmets and armour, it will only knock them out instead of killing them, the player will have to finish them with a dagger or sword. broadhead will inflict bleeding damage on a unarmored enemy but will not even hurt an armoured enemy. The AP (armour piercing) arrow will go through armour and kill the armoured enemy but will do little damage.