[Autumn]

I have to agree with all the points Walrus has brought up, alongside two more abuse-able forms of skip shenanigans, since On My Mark was brought up:

Muuden:
This one should be pretty obvious, once using geist you'll automatically skip, regardless on if your current skip is on cooldown or not, also it can be used on round 0 unlike normal skip, allowing you to immediately get the advantage before anyone can even skip or react to it.

Muuden should probably fall under the normal rules of skip, not being able to proc on round 0, setting skip on cooldown and not triggering if skip is on cooldown.


Pray:
Like Extend Void and Meditate, this will extend the duration of skip, since it extends all positive statuses you cause.