I’ve casted my Alby buff on my team, and then collected what game says about percentage of mana generated from Alby’s buff:
For fast heroes, it says “Recover 10% of mana each turn”.
For average heroes, it says “Recover 8% of mana each turn”.
For slow heroes, it says “Recover 7% of mana each turn”.
The skill description says “Regenerate a moderate amount of mana each turn”. This means that for fast hero, moderate amount is 10%, for average it’s 8% and for slow it’s 7%.
My assumption is that “moderate” amount of mana is actually 80% of a single tile. So, for fast and average heroes it’s 10% and 8% respectfully, for slow hero it’s 6.7% (rounded up to 7%).
For very fast, the prediction is Alby’s buff should give 12% of mana each turn (confirmed by my observation), and for very slow it should be 6%.
Can someone with a very slow hero and Alby confirm that after casting Alby’s buff, in list of the buffs for the very slow hero, it says “Regenerate 6% of mana each turn”?
For Misandra, “small amount” looks like 50% of a single tile:
7.7% for very fast heroes
6.3% for fast heroes
5% for average heroes
4.2% for slow heroes
3.7% for very slow heroes
TLDR: My current theory:
Base “Moderate amount of mana” is 80% of a single tile
Base “Small amount of mana” is 50% of a single tile
This amount is affected by cumulative mana regeneration bonus.