Sight stone
and
are nearly never used and I think it should be buffed for that reason.
I think the amount of health they carry should be increased.
Should have 300 health
+
=
Should have 800 or 1000 health
Yes, I understand you are also paying for utility. What if you made the health increase over time, as with 
There are a few health based champs [
] That would like this change. but wouldn't make them overpowered