TheCosmicKid
Hero
I think most D&D players would be a little bit underwhelmed if you took the fighter class, described them as not using arms or armor and all their successes being due to magic, and called that a wizard. Yes, the base state of an adventurer is that they succeed at things. But we have a class system on the assumption that different adventurers succeed at things in noticeably different ways.I don't see this as a class. I see it as purely flavour text.
Take any class, give them any combination of abilities and then describe them as never training and with all of their successes being due to luck. Bang, lucky guy archetype fulfilled.
The base state of an adventurer is that they succeed at things. The 'lucky guy' archetype is purely the addition of 'despite being bad at everything' to the end of that. There is no mechanical change needed for that. It's the same as 'because I was trained by an ancient order' or 'because I learned to survive in the wilds' or 'because my world needs me'.