Flash and Ingite best because throw W and E(ult) then ingited and your kill cant alive.When alive flashed and E get kill.
Items:Good starting with boots of speed and 3 potions.After it good buy CD,for CD is good Morellonomicon its give you CD,MR and AP,when your target low hp reduced healing efect.Next not bad buy Liandry"s Tornment give you prenetration and HP.If casting spell its deal magic damage of curnetly hp its good but when used ulti all times be open efect of this item.Next build Sorceres shoes and enchantment:Furor.After it buy Rabadon Deathcap for strong ability.Rylays crystal scepter is good for Hp and perma slow efects.With Voidstaff can end it or can buy Deathfire Grasp.Good first upragade on spells E for good time dmg and then small update Q and then W for 5 lvl but its beeter strong for him ult.Ability and spell blade good for him farm on basic atack and mana regenerate and cd for spell cast.Best runes for CD and Spell vamp for spell cast and spell vamp with spell vamp mon masteries are beeter then cane return hp at lvl 1 wiht use spells.