Max W first, heal second, and your ulti whenever you can. You do alot of burst, so stun enemy adc carry, walk up and pop w (when 6, w and r) and hopefully your adc follows up. (Careful when popping your W, you lose half of the benefit if you do. Also, try not and spam your stun, it is mana intensive.) If your team decides to tower dive earlier levels (Level 5+) and you have a decent health pool, tank the tower for them. Keep up with wards, especially on dragon and baron. Get at least 2 GP5 items (Heart of Gold + Philo Stone reccomended), and dont rush them into a bigger items (usually I get aegis and another full item before I upgrade heart of gold or philo stone). You are a great initiator due to your stun and tankiness, so take advantage of that. Runes I usually go with GP5 Quints, Armor yellows, Magic resist or Magic resist per level blues, and magic pen reds (for early game burst and general tankiness).