Talk:Mastery Rank/@comment-45.244.26.12-20170420000218/@comment-25254386-20170420020103

1.4 mil get's you to MR23, you only need 562,000 affinity to get to MR15. In order to get MR15 you would need to rank up only ~40% of all applicable items in the game, not 100%.

Not sure what calculations you made but these are the numbers so you don't need to worry about not being able to use your Riven.