Creating new support mastery options

A new mastery option with 1 point that allows 20% cost reduction for wards, including sightstone. I believe it would encourage buying a ruby sightstone. ALSO mastery option with 3 points that extends the time of stealth wards to 4m, 5m, 6m. ----------------------------------------------------------------------------------------------------------------------May be too strong^^^

20% of 800=160 20% of 400=80 20% of 100=20.. 20% of 75=15