Not Updated For Current Season
Reference, might make a guide.
Sheen, ROA, Mercs are core, try to get to Lich and Void. Replace with others to add tankiness or damage. Last Whisper for turret destruction.
Magic pen mastery and utility for more mana regen.
Runes for AP and dodge.
Skills are versatile. Max Grab quickly is you have ranged. Stun for melee. Ulti always.