Lane Focus on applying pressure. Infuser so you can live in your first ult. Stun off CD to harass. Same items for solo/duo, order is flexible. In bad matchups, it's ok to be a boring opponent; just sit back and last hit.
Push Time! T2 balls gives you surprising obj push and kill threat. They're your early game crutch.
Mid Game Start spamming your slots with these t2s. Pick one from healbane or improved cooldown. Try and keep infuser as long as you can, but sell enduring when needed.