Help with carrying late game with Kraken Slayer build

Ive been playing WW again after a long time, and I'm testing all of the new builds I saw people mentioning. I really loved playing with Kraken Slayer first item into another dmg item.

Getting super fed has not been a problem (in Emerald, Ive gotten 25+ kills in multiple games) but I really struggle with closing out the game.

I don't want to change into a tankier build as I really like this one's playstyle, but are there any tips to carrying when Im ultra fed? Its happened a few times already where Im fed but come ~30 minutes and I feel very useless. Im pretty sure Im doing something wrong.