Support (in-game) XP Help

The only thing I find really frustrating when playing support is that I'm always way underleveled compared to the players in the other roles. I would have a small change that could help it out a bit:

Sightstone items: placing down a stealth ward (from a sightstone item) when you have 2 or less wards out on the map already grants you 10 XP (+2 XP per level?).

• Rewards warding (map play/objective focus) and can slightly help out roaming
• Prevents cases of abuse by only working with sightstone items and only when you didn't place 3 wards out already (no spamming wards in base)
• XP numbers subject to change (scale with level?)