Hey!
I would like to suggest creating RF, MG and DL at level 0 for free.
VIP players already have a lot of advantages on the server, and in one version that will be slower to level up to 400, forcing every casual player to achieve 150 to start again would create a larger gap between VIP and Free players (becoming a little "pay 2 play", given that almost everyone needs to buy VIP in the first week if they wanna play with those classes).
Furthermore, i dont think that would make a lot of difference in terms of $$$ for the server - people that wants to be competitive still needs to buy VIP from the beginning
In this way, people that want to play just for fun will be more free to play with any class they want.