Staves are two-handed weapons with the unique trait that they count as
two separate weapons when determining the number of attacks per round.

The following are examples of the number of possible attacks when
wielding one or more staves. The first examples assume that the user
has trained double hit and ambidexterity but not whirling, whirlwind
attack or similar skills.

1 + 2 limbs: a staff
    4 hits (two left handed with staff, two right handed with staff)

1 limb: a dagger
2 + 3 limbs: a staff
    4 hits (two left handed with staff, two right handed with dagger)

1 + 4 limbs: a staff
2 + 3 limbs: a staff
    4 hits (two left handed with staff b, two right handed with staff a)
    Note that this requires ahrimazda's awield.

1 limb: a dagger
2 limb: a dagger
3 + 4 limbs: a staff
    4 hits (all with daggers)

The next examples assume the wielder has four limbs and has trained
the whirling skill in addition to the above mentioned skills:

1 limb: a dagger
2 + 3 limbs: a staff
    6 hits (two left handed with staff, two right handed with dagger, one
third hand with staff, one fourth hand unarmed)

1 + 4 limbs: a staff
3 + 4 limbs: a staff
    6 hits (two left handed with staff, two right handed with staff, one
third hand with staff, one fourth hand with staff)

1 + 2 limbs: a staff
3 + 4 limbs: a staff
    6 hits (two left handed with staff a, two right handed with staff a,
one third hand with staff b, one fourth hand with staff b)