Scaling values are not correct for "Greater Glyph of Scaling Mana Regen" (Riot can't math)
http://puu.sh/gX12Z/b88128dd47.png
As seen in the picture, Glyphs give 0.06 per level, for a total of 1.2 at level 18.
0.06 regen/level * 18 levels only yields 1.08 regen at level 18.
Steps to recreate:
- go to shop
- go to runes
- search "Greater Glyph of Scaling Mana Regeneration"
EDIT: post was super sassy, changed to make it more serious.