I was messing around with the favourites doing a glitch I found months ago. I decided to try and experiment with this glitch more and I found that it makes dual wielding 1,000x better.
You can use a staff as the right hand melee weapon and any 1 handed melee weapon as your offhand weapon.
Here is a picture of what I mean http://i.imgur.com/g8Zb9zl.jpg

requirements-
1. Have 2 of the same staff.
2. use 1 of the staffs so that its uses are lower than the other.
3. favourite the staff with the most uses.
4. favourite a shield.
5. favourite 2 different 1 handed weapons.
6. favourite a bow.


now here is how its done-
1. go unarmed then activate the favourites menu.
2. Equip a favourited 1 handed weapon in your right hand (not a staff)
3. Equip the favourited shield and exit the favourites.
4. unsheathe the weapon then activate favourites.
5. Equip the favourited bow
6. Exit favourites and allow bow to be held in your characters left hand.
6. activate favourites and Equip the favourited shield using the offhand button/trigger.
7. Equip the favourited 1 handed weapon in your right hand. (same weapon you equiped in step 2).
8. Equip the favourited staff in your offhand then exit favourites.
9. activate favourites and unequip the staff using the offhand button/trigger. (Staff should still be in your right hand and can be used as a melee weapon. Your right hand melee weapon is also the weapon you equiped in step 2)
10. Equip the other 1 handed weapon in your offhand.

you should have a right hand melee weapon + staff and an offhand melee weapon.

After doing this Do not equip a sheild or other right hand weapon or the staff will disappear from your hand.
do not unequip the right hand weapon or the staff will disappear from your hand.
you can unequip and equip the offhand weapon whenever you want to go 1 hand or dual wield.

anyone tried it yet.

What kind of damage does the staff do?

It does the damage of the weapon equiped in step 2.