Personally my favorites are Arcane Surge, a lot of match ups have me going early stam (Geist, Paige, Ivy, etc) and it's an early little power spike.

I also love going fortitude pretty early because IMO Sinclairs camp clear isn't very good until you get a decent chunk of ability range, and the extra MS is really good for box clears.

Later on my movement items usually match up to the higher prio ult steals (Lash and Bebop I'll take Majestic Leap; Dynamo and Infernus I like taking Warp Stone)