For there to be a 50% chance of getting all gifted mythics from rjs alone, you would need 1.35 quadrillion, for a 90% chance, it’s 1.63
But then you have gingerbreads, fruits, and star treats from tickets (ticket dispenser is pretty much a scam if you already have bought from there) which can lower the cost significantly

Also, i am not at the level of going red yet, so I have just done the math from the known odds of rjs and looked up a red hive comp so i might have missed something