Pretty sure upgrade 2,3 from Mana doesn't work as described?
1e28 points would be 2^28 so an xp increase of about *2.6e8.
And my xp certainly didn't increase by that much. Not even close.
Edit: 2,4 from Mana and 1,3 from Time also don't do as they say?
Mana 2,4 boost is less than it claims it should be (just like 2,3) and Time 1,3 doesn't seem to cut the spells' time?