Hi,
So I did run second session to see results for strategy Silver Opal Opal but with t16's. We've got 1 ex and 1 div, which seems fine for this strat. But overall I don't see much difference between T16's and T15's. T16's have always been more expensive but this league it's only 2c.
I'd say do both so you can buy more maps in bulk, so again, time and comfort is major factor to decide. There's no visible difference in loot so if you're struggling with t16's, just do 15's and you'll be not missing out on anything.
Spreadsheet:
https://docs.google.com/spreadsheets/...