Or... Shield/Sword/Spells/Staff/Stealth/Spiral Tower/Specializations/Second Implement... Well you get the theme, things starting with S.
Eladrin
str 12 dex 14 con 16 wis 10 int 18 cha 8 + stat bumps to int/con (Alternatively, this build can be 13 str/dex and skip arcane reach/shield specialization till later).
Extra skill: Stealth
Staff Implement Mastery.
Paragon Path: Spiral Tower.
Feats
1. Leather armor
2. Two weapon fighting -> 12. Hide specialization or check below
4. Two weapon defense -> 11. Shield Proficiency or check below
6. Improved Init or check below
8. Toughness or check below
10. Eladrin Soldier
11. Shield Specialization
12. Hide armor
14+ Free, but some recommendations: Second Implement (wand), Arcane Reach, Wintertouched, Lasting Frost, Skill focus stealth, Feystep Protection, Eladrin Soldier.
Note: Don't take weapon focus as it won't stack with longsword, tho if you use say a bastard sword via a feat, it might be worth it.
Spell selection: Bigby ones. This combos well with the shield specialization or two weapon focus due to the reflex bonus. Avoid any Save end spells, wall effects and the like are also good for you.
Notes: So your Will defense is kinda bad, luckily Eladrin bumps it up by +1, and wizard does as well, leaving it pretty well rounded overall.
High defenses are great, staff mastery will make any unpleasant attacks that are close miss completely.
Stealth training, though not as cool as a warlock there's a few ways for a wizard to get cover as well as the following Combat advantage then.