Level up a Noblesse to 50?

Hi.

Should I level up a noblesse to lvl 50 so I can get the onyx ring for my night walker?

Also...
Do I have something to lose if I level up a noblesse to lvl 50 and then get the job (if its possible with the new revamped cygnus knight)

I think the level requirement for normal Zakum has been raised to 90.

Please... no t.t

Anyways, if it is really lvl 90 now, should I still try? D: