Basically Sun has already durability. We will buy more durable items and survive very long time at team fight. You have a little damage but highly HP-Durable. I advice to like this builds the another heroes. You can win like this build. And you can comment the which items should buy for Sun.
Sun More Defense-Attack Items
First, get this item:
Get this item:
Finally buy this item:
This build very strong dude, and also you can say by commenting your idea about Sun builds 🙂
I almost forgot, you can sell your boots when the late game.
If you sold your boots get this items:
for More Attack Damage (AD):
for More HP-HP Regen:
for HP-Magic Resist:
Thank you for everything 🙂 ^^