It's a force which stresses mobility (with the exception of the Chugyullas). All of them have jump-based movement either before or after they dratp, and only Gilgame II is really hurt by Nemchant's undrapt ability. Olip is the Navia Guard of choice when my goal is mobility, because of his flip ability.
Chugyullas may be switched out with something else at some point in the future, but his Gyullas-crystal accruing power is just ... so useful.
I used these seven in a game against the Billpentod/double Koma/Gyullas Turtle/Odd/Nemchant/Agulinilios Eternal Wall Of Black Gulled - after I lost the first game, I won the next two pretty handily.
Of course, the Eternal Wall is a one-trick pony - but it does that one trick so very well ...