How do they do draws for champs

Basically is it one 1st, 2nd, 3rd, and 4th seed from each region or something elss?

yes so for example, LEV gets 1st, FPX #2, DRX/PRX #3, FUT #4

They have 4 lottery bowls, 1 for each seed. they pull a name from seed 1, pull a name from seed 2, 3, 4.
If seed 2 team is the same region as seed 1, that seed 2 team will be in the next group (only 1 team per region, per group)

It is
1st from Region X
2nd from Region Y
3rd from Region Z
Championship points qualifier from region V