Originally Posted by Lollerman
I list my AP ratios as [AP/1Damage], so to find out the damage using my list, you divide your total AP by the AP value. Your AP ratio (along with Riot's in their patch notes) are done in terms of damage/1AP, so one using your list would multiply total AP by your AP value.
Where as you divided your damage by the total AP, I did the opposite, that's the main difference.
Back to your list:
Katarina's ult isn't always AP based, it picks the higher value between 20% max AP and 15% physical damage. The correct ratio should be 0.2, but that only applies if your physical damage doesn't exceed your AP by roughly 1/3.
Final edit: the following numbers are off
Curse of the Sad Mummy should be same as Dark Wind: 0.35 rather than 0.4
Fiddlestick's Drain should be 0.4 rather than 0.35
Blitzcrank's Static Field 0.25 rather than 0.3
Rammus's Defensive Ball Curl 0.25 rather than 0.3
Soraka's Astral Blessing/Starcall should be 0.08~0.09 (half your value) and 0.4 respectively
(and yeah, Teemo's Toxic Dart is 0.1, it's still messy but rounds off to 0.1, I'm going to test Amumu's Despair again...)
Oh, srry, I had the percentages mixed up, I'll fix that, along with the other ones you've named (this is why I'm pinpointing values right now, so I can get more precise answers instead of rounded ones.)
Another thought, in a set of patch notes I recovered in the forums said that Soraka's Astral blessing was a 0.085 but it was taken into account twice per second, so I figured it could be doubled and said as 0.17