User blog comment:TheTobarMethod/Hi Varus....I love You!/@comment-2248060-20130107062439/@comment-2248060-20130107140239

Look at say... Miss Fortuine 5% AP (up to 20%) on AA's 80% AP on an AoE and 160% AP on ult

full combo (hitting 4 AA's) would be 260% AP

for Varus its 25% on AA's and 100% on ult (I wouldn't know how to calculate the AP ratio counting blight explosion so forgive me) but he does have %health damage if he gets his full combo off with 3 AAs