As Arcane Tricker you absolutely want to dual wield, that off hand bonus action attack will be your best friend. Sleep + bonus action sneak attack is pretty much a guaranteed kill. Pick crowd control and defensive spells, Shield is an amazing insurance if you really do not want to be hit by a certain attack, Magic Missile is your go-to ranged finisher, Hold Person and Blur are both great offensive and defensive options, Misty Step for incredible mobility. And let's not forget Invisibility! Arcane Tricksters are also great enablers for other melee characters, let your wizard concentrate on Haste or other powerful spell while you handle Hold Person so your Fighter/Barbarian/Paladin can kill that unfortunate guy who failed his save in a single turn with guaranteed crits!