@Juji Thank you for the response. I think the simple solution will be to remove the insane +15 Weapons/Armors and put back XP/SP and spawn boss cakes in each city to reduce lag from players. That will make it.
Those Vip/lvl ideas are the worst solutions I've ever read, because again will turn into a PAY2WIN event, where is the ultimate 15th anniversary event if not all the player base could enjoy if they don't pay atleast 400 NC Coins for each account they own.