this xin build is very strong but wont work vwery well if you are targeted first in a team fight and that the enamy team has a lot of crowd controle but is perfect for targeting and birsting down one enemy after the other.
If the enemy team has alot of tanky chraters that have alot of health change the infinities edge for madred blood razers.
the runes are chosen to make him better over time but can be changed to give him an adventage urly game by giving him flat damage runes
The second build is good if you want a tank xin that can deal a good amount of damage.