It is probably just me, but..

[Foo01]

Main scenario foes mix things up better than low level, but I am always dropped into Castrum, which never feels like the seals I am getting are worth the time unless we pull a speed run and at least I like Tam-Tara.
...

It is not about whether it is worth it to you. You should not speed run it unless everyone agrees to it and there is no 1st timers. The roulette is there to help other players, and sometime might even help yourself level your alt.