NA Groups Tiebreakers

I'm not 100 percent sure how tiebreakers in groups work. Faze is 1-2, C9B is 1-2, and SEN is 0-3. They are all fighting for 1 spot. SEN's remaining two games are against C9B and Faze, and if they win both games, let's say Faze and C9 win their other ones, all teams end up at 2-3. If all teams end up 2-3 fighting for one spot, what is the tiebreaker? Round differential, Map wins, or H2H?

H2H

Kepin [#2]

H2H

Ok so SEN wins both games and they clinch then correct?

Kepin [#2]

H2H

Yo...why would they do that?

080305 [#4]

Yo...why would they do that?

To tickle your toes