Support Mastery - Warden of Vision

As RIOT / LoL is considering some options to make the support role more attractive, I wanted to share a thought. I'm a support main, and love the role, even if I'm not nearly great or even good, I'm enjoying it and the game. I'm also grateful that RIOT / LoL is making many supports free for me to test and try.

One of the issues mentioned was supports are usually more or less required to buy Sightstone and spend 800 gold on it, which is a lot of gold considering it doesn't provide any stats (this would of course also be really overpowered if it were the case)

What could mitigate this issue, is a final mastery (like death fire touch, thunderlords, etc.) that would give extra wards. Obviously just plain giving 3 extra wards would also be very OP. So, my idea was something along the lines of giving a support an extra ward at for example 5-7 minutes, then another at 10-12 and 15-17. Obviously I'm just semi-random assigning minutes, as it would require a lot of balancing.

This mastery would however also have to limit a support from buying sightstone and placing a dozen wards a time.

Another part where masteries could shine for supports is specific masteries buffing ward time, vision, and hit points for example. Something like this might require a separate mastery tree, and of course will need extensive testing and balancing, but it could also mitigate the cash-flow problem supports seem to experience compared to other roles, as 800 gold goes a long way towards for example a or a .

This could be quite strong when it comes to vision and warding, but a support would have to sacrifice a lot of individual benefiting masteries to provide for the team as a whole. This could, making the generous assumption players on the team are not toxic or selfish, give more of a sense of team play or at least the support putting the proverbial collective before themselves.

What do you think? Would this be an interesting idea, or a potential solution to an issue that affects supports? I'd like to hear your thoughts, critiques, and suggestions.