Swap hands and you should be able to, I think swapping hands in combat doesn't cost, but I think you will still prioritize a melee weapon.
Why would you use a dagger wit ha want in the first place though ?
Either use dual wands or dual daggers, I can't even recommend dual melee weapons other than daggers
To switch any weapon, is a cost of 1 AP. Mainhand weapons are prioritized.
Scoundrel has a lot of skills that are magic armour resistant and and deal magic armour damage. My current build is mainly scoundrel and aero hybrid, and having a wand to set a base status is really good, such as shocked or wet so I can set stun for next turn instead of having to use all my CD.
I also don't always be in the center of combat.
