It's alright, as long as Tibbers knows I've done this before, it's enough ;_;

*sniffle*

Hope you'll be around more often than I am to keep the list updated, apparently I'm not active enough (despite always updating it every patch?)

I kid, I kid...o n a less petty note:

It seems some of the figures are off, or completely missing (Triumphant Roar?) you could use my original AP list to fill in the blanks if you wish; at least your guide is actually in alphabetical order, not to mention it lists AP ratio in the form people prefer it.

Edit: I WILL point out, however, that my Kayle numbers haven't been updated since her re-make. You can start there.

Despair is 1% damage per 200 AP.
It shows up as 1% at 101 due to rounding, but I've had 280 AP on him and it still showed 1%.

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...)