A ward change idea

with the upgraged trinkets putting so much vision on the map sightstone doesn't change so much for those poor supports since they can put 3 green wards down and 1 pink and I got an idea to help those supports

what if there was a mastery in the utility tree that has 3 points in it and here's what it could do

1st point: you can place 1 more green ward 2nd point: you can place 1 more pink ward 3rd point: your green wards last 30 seconds longer

OR make a the ruby sightstone give access to those 30 seconds longer green wards and the sightstone give the 4th ward or make a new upgrade for sightstone for those 2 and maybe make a something like 1200 gold item that gives some stats and has a charge system for pink wards with one charge every like 120-180 seconds and allows you to have 2 pinks on the map

so what's you guys toughts about it?