An option to make more people buy Sightstone
Have an option to upgrade more minor items into Sightstone. For example:
150 HP 400 gold -> 
150 HP plus wards 800 gold -> 
400 HP more wards 1600 gold
10 AD 360 gold -> Slicing sightstone (name pending) 10 AD plus wards 720 gold -> Sabre of Sight 25 AD more wards 1500 gold
20 AP 435 gold -> Caster's sightstone 20 AP plus wards 870 gold -> Magician's Sightstone 45 AP more wards 1740 gold
Now people can't complain that getting vision doesn't give them damage.
You could do other ones too, like 
.
Opinions?
