[{quoted}](name=Clockwork Mouse,realm=NA,application-id=3ErqAdtq,discussion-id=5N9eIxiv,comment-id=00010000,timestamp=2019-05-27T05:16:57.605+0000)
Moderate? How many champs have an ability that's base damage is over 300? That is a lot of damage for only 65 mana. and it is CC. And a 1.0 ratio on Ap is huge!
300 damage is a fully charged Sion Q. The only ability that I could find that does more base damage that is not an ult is Zoe's Q at max range.
Why are you asking for abilities with a base damage over 300 when Cho's Q has exactly 300 base damage? It's the same as Ez's W, which costs 50 mana (with a potential refund). And yes, 1.0 AP ratio is pretty significant, which makes sense for a slow spell on a champion who doesn't build a ton of AP anyway.
Once again, Cho will not be one-shotting anyone with Q unless they are several levels behind. It's more likely that the Cho ulted right after the Q hit.