2 clarification questions:

What levels, in order, give the most crowns? I've noticed Battle Arena and the lead up to Jelly King are good for crown, but not JK himself? And the Scarlet Castle levels have been give and take. What are the best runs you can do for money?

As I understand it, the second half of a tier generally gives better drops than the first half. Does the first half of T2 give better drops than the second half of T1? What's the comparison there?