As samira, Three points in her Ultimate R will give her a huge power spike. The ability will dish out a lot of damage and heal Samira heavily, so team fights will be optimal.

Her life steal combined with her damage and mobility during the late game will make her really good in team fights. She will just need to maintain proper positioning and use her W properly.

She will have multiple items during this phase of the game. It will allow her to dish out tons of damage. Prolonged team fights will see her winning effortlessly. As samira, Three points in his Ultimate R will give him a huge peak of power. The ability will dry up a lot of damage and heal Samira heavily, so that team fights will be optimal. His life flying combined with his damage and mobility during the end of the game will make him really good in team fights. She will just need to maintain a good positioning and use his W correctly. She will have several items during this phase of the game. It will allow him to flatten tons of damage.