[@olcharlieboi]

I think half the fun is actually gaining experience and "leveling up" and all that through hard work. I agree with you that OP protags can be fun, but then having them let's say being able to manipulate all elements at the very beginning and then being able to level a city five chapters later is a little over the top. It saps the adventuring fun out of it. 
Also, having said that, will you be including stats, leveling systems and all that to this Rp? Or would you be going for the simpler learning each stage of your abilities a little at a time?

Also, how do you plan to draw lots for abilities? Using a dice system, random generator, etc? (Sorry for all the questions ^-^" )

"Store Management" doesn't sound too bad. I can think of various ways it would be a good support ability for a group.