Sorry Feather But the person who brought up Rune-Arms is right!
X-Bows simply cannot be wielded in one hand! We're not talking Drow Hand X-Bows here but Heavy Repeaters!
Rune-Arms provide a massive power boost to Artificers that no other class in the game gets!
And you're telling us that this is all fine and dandy {even though completely unrealistic} for Artificers But you're not gonna let Arcane Casters hold a staff one handed?
I assume you do know that when in Zombie form a Pale Master wields his quarterstaff one handed?
Just use something like this ^ for having Staff and Orb equipped rather than making said caster not be able to defend himself physically at all.
We still don't have Wizard Hats {Except for Elminster that is} which we've been asking for for years.
Wizards and Sorcs are not Acrobats or Monks as someone said.
And as for Staff and Orb - Well I'm guessing that there's going to be redundant bonuses - I haven't personally seen the War Wizard's Staff and have only had a glimpse at the Orb the Op's talking about - but even if they complement each other perfectly for casting = This is how it should be at Epic Levels!