Well... that character didn't get selected for the game unfortunately (there were a zillion applicants)... but I'm apping a lower level version for another game.
After looking things over a bit, I don't think that you're restricted to using wands and staves for Magus spells when using the Wand Wielder arcana. So just by sticking some ranks in UMD and picking up that trait that lets you use Int instead of Cha for it, you can be tossing out heals/buffs/etc from other classes without multiclassing at all. (The new DM has OK'd this)
I also noticed another interesting option: card caster! This would let you actually use your touch-range spells at range! And it can be combined with Staff Magus (I'd wager that whoever designed these made them to work together, and was a Gambit fan
)!
The Staff Magus archetype is actually pretty unecessary for this whole thing also, since you can recharge staves normally with your spellslots. So as long as there is at least 1 Magus spell in there, you should be good to go without the 10th level Staff Magus ability. (Also there is a homebrew material that you can use to make
wands and staves out of that will cause them to automatically recharge at the rate of 1 charge per day... yes, I know...)
So... new build is just going to be Magus 3 with the Wand Wielder arcana. Not sure if I'll go with either/or of the archetypes. (I've never even read a Gambit comic... never been much of a comic fan...)