So basically you start with Cloth and 5 health potions for insane sustain especially with your W (hiten style). On your first buy back try getting boots and some pieces of wriggles, get madreds then vampiric sceptre if you dont' have enough for the boots and wriggles. Then with Wriggles abuse the ward it provides and whenever E and Q are up abuse it by harassing. Next you can get a sheen if you prefer it over phage but I prefer phage for slow and tankiness. Anyways once you got your phage, just go for a mercury treads into wit's end and then trinity force into guardian angel and then banshee's...

Irelia should be the initiator unless your team has ashe arrow or a great initation like Malphite ult etc ask me if you don't know kk?

And basically this should be fine for you

OH **** YoU WON YOUR LANE? GG

ALSO ****ING ABUSE TP IF YOUR TEAMMATES GET INTO A LITTLE BATTLE THEN JUST TP TO A NEARBY WARD AND WRECK PEOPLE.