Ranking the "shit hits the fan" episodes is a little harder though
Tough Love was mostly not very good, like 2/3rds of the episode is wasted on painfully drawn out gags that aren't very funny. But the big scene at the end was really great and taken things in an unexpected and interesting direction before the finale.
Just Friends had a whole lot of nothing happening most of the episode but at least it felt pretty natural, and the whole concert scene is pure kino and was a lot longer than the good part of Tough Love.
Marco Grows A Beard is consistently good throughout and has a solid ending with Toffee making his move, but it's hard to say if it ever hits the highs the other two do in their big moments.
Taking into consideration how well they fit/complete their respective seasons, I think the ranking would be
Just Friends >>> Marco Grows A Beard > Tough Love