This isn't an option for a few reasons.
The sheild, other than any all stats it currently has, has no attack damage, Only thing it ups is Defense. Sorry it's not a smashing board (sadly)
Rods and staffs for a mage yes. but in PVP do you REALLY have time in the middle of a fight, to switch your staff to a rod, heal and then switch back to fight? Not really.
To date the sword and shield classes are the only one with TRUE dual weapons.
I'd like to see it differently but sadly that will NEVER be a reality.
I'd love to be able to mix and match daggers, or dual swords but y'know that won't be an option. by mix and match i mean. Imbued nereus and imbued blood letter at the same time. something like that. but yeah off topic.
Anyway since shield doesn't up damage. no use in upping it's PVP damage now is there?
that said i'm off to work now think on those things ciao