Adaptive Helm discussion
Because I couldn't find a list of all cooldowns and don't currently have the time to make one, let's talk about the champions Adaptive Helm actually functions against. That is, those champions with spells that can have a cooldown lower than 4 seconds.
Those that come to mind are:
{{champion:13}

If there are any I missed who can get cooldowns below 4 seconds with 20% CDR (since the go-to item grants 20), please comment.
and etc