Late Job Advancement

I apologize if I misunderstood the intent of your post and/or offended you, but based on the way you post (not just in this thread) it seemed like you were pomegranateposting. Regardless, don't assume people lack the common sense to test things on their own. If I needed to know how to do it, for example, I'd have asked "How do I test this?"

Getting a Noblesse to 15-20 wouldn't suffice because, as stated in the OP, I need level 33 for this event. I'd need to level beyond the second job advancement to properly test this, which as you said would be ridiculous (especially with this update and without character cards). Hence me being averse to testing this myself.

Well actually i meant telling someone to get to 33 on a noblesse is ridiculous, not the actual act of getting to 33 on a noblesse. If you want to get to 33 it isn't that bad, especially since as someone said earlier and i totally forgot about, noblesse can mob. We have all these multi/combo exp bonuses and runes now so it shouldn't take more than a few hours or so even on a totally bare character/account.

I wasn't assuming you didn't know how to test it or didn't have the common sense to figure it out, i was more assuming that no one here would know the answer 100% having tested it themselves. Not sure which is worse.

I'm sorry that no one knows for 100% sure, but we're probably over 90% sure there are no penalties at all, so it's not totally disadvantaging to you going forwards.