@Riot, Do you have any plans to improve keystone mastery(ies) for mages?

Since the start of the season there's been repeated iteration on the masteries for AD champions, making sure that ADCs have a choice between Warlords and Fervour as well as the generalist Thunderlord's. This has not been true for mages.

Non-DOT mages do not have any real choice in keystones, the only keystone you can actually justify picking on most mages is Thunderlord's. The keystones that are meant to be alternatives are just terrible.

I think at this point it's safe to say that Stormrader's is a failed experiment, it's not really good on anyone outside of the possible abuse case on Tahm Kench. Deathfire is just too specialised to be a real alternative to Thunderlord's, it's good on a couple of people but for the majority it's god-awful. This leaves mages with a single option from keystones, which doesn't seem like what Riot's goal with the new masteries was.

Something needs to be done about this and the way I see it there's two main possibilities. Either a new keystone could be added if there's actually something redeemable about Stormraider's or more realistically Stormraider's could be scraped and replaced with something usable.

And for anyone who thinks Stormraider's is in someway good it's picked less than 1% of the time which is 4x less than the next lowest mastery, ignoring Warlord's since it's being reworked.