Hmmm since odds are 1 in 50, I wouldn't do more than 50.
Nor would I do more than the current floor's worth.
You'd also have to math out the EV of say, 10 randomly chosen lands against 1 single 9 star. It gets complex for sure ahaha. I'd want to wait for the alpha meta to settle before ever giving up too many unopeneds at this time.