Partner Event Mega Slot Trick

This last partner's event (Amazing Partners) was break even at best and a dice guzzler at the worst. Why? 

They added the Mega slot in exchange for the 5k/10k/20k/ etc. slots, depending on your multiplier. The mega slot is much harder to hit and often returns fewer dice than 5/10/20k when you do. It was a VERY bad deal Without the Mega slot it generally takes from 6k - 7k tokens to complete a build. With the mega slot it generally takes 8k - 10k.

In summary: the Mega slot is rarely hit and rarely gives more dice than the other larger and more common slots did. The Mega Slot is a shiny invention to gobble your dice while you purr like a kitten.