Nice build. I've similar builds for wand using melee types.
The builds are too involved to type (copy-paste mangles the formating) but I can mail them to youif you're curious.
I think the UMD check is DC 20 for wand activation.
Anyway, the list below might be helpful to pick the Arcane Class.
My pick of "useful" spells leads me to choose Wizard personally...and I use a cracked Vibrant Purple Prism (Ioun Stone) to store 1 1st-level spell that's loaded via UMD
=======SPELLS_1st_LEVEL (Options for Wands)
===CombatBuff
[Rng] Lead Blades: Melee weapons damage as if one size bigger.
[Wiz] Shield: Invisible disc gives +4 (shield) to AC, blocks magic missiles.
[Wiz] Obscuring Mist: Fog surrounds you.
[Wiz] Enlarge Person: Humanoid creature doubles in size.
[Wiz] Magic Weapon: Weapon gains +1 bonus.
[Clr] Shield of Faith: Aura grants +2 or higher deflection bonus.
[Pal] Divine Favor: You gain +1 (luck) per three levels on attack and damage rolls.
[Pal] Challenge Evil: Sickens creature if it refuses to fight you. +2 (sacred) melee vs target, Will save negates
[Pal] Ghostbane Dirge: Incorporeal creature takes half damage from nonmagical weapons.
[Rng] Hunter's Howl: Treat enemies as favored for 1 round/level.
[Rng] Magic Fang: One natural weapon of subject creature gets +1 on attack and damage rolls.
[Rng] Entangle: Plants entangle everyone in 40-ft. radius.
===CombatDeBuff
[Wiz] Grease: Makes 10-ft. square or one object slippery.
[Drd] Faerie Fire: Outlines subjects with light, canceling blur, concealment, and the like.
[Wiz] Color Spray: Knocks unconscious, blinds, and/or stuns weak creatures.
[Wiz] Touch of Gracelessness: Subject loses 1d6 + 1 Dex/two levels and is prone to falling down.
[Clr] Murderous Command: Target is compelled to kill its ally.
===Utility
[Wiz] Infernal Healing: 1hp/round (Inner Sea Guide)
[Wiz] Touch of the Sea: Swim speed becomes 30 ft.
[Wiz] Summon Monster I: Summons extraplanar creature to fight for you.
[Wiz] Protection from Evil: prevents bodily contact by summoned creatures, prevent mind control, +2Ac (deflection) +2Saves vs evil
[Wiz] Air Bubble: Creates a small pocket of air around your head or an object.
[Wiz] Charm Person: Makes one person your friend.
[Wiz] Comprehend Languages: You understand all spoken and written languages.
[Rng] Summon Nature's Ally I: Summons creature to fight
[Pal] Restoration, Lesser: Dispels magical ability penalty or repairs 1d4 ability damage.
[Pal] Honeyed Tongue: Roll 2 dice when using Diplomacy, take higher roll.
===Movement
[Wiz] Expeditious Retreat: 1min/level, Retreat: Your base land speed increases by 30 ft.(enhancement)
[Rng] Longstrider: 1hr/level, Your speed increases by 10 ft (enhancement) to base speed only (doesn't apply to burrow/climb/fly/swim/etc).
