Runes Reforge Questions

So I unfortunately do not have a PBE account so I can't test out the new runes. With that said, I have some questions about them.

• How do Press the Attack's stacks work? Does it stack each time you damage an enemy champion? Does it stack with both basic attacks AND abilities? How do pets affect this rune?

• What happens to Press the Attack's stacks if you hit multiple enemies at once with an AoE ability?

• Does Fleet Footwork, Taste of Blood, Dark Harvest, etc only apply on basic attacks or also abilities? It wasn't specified.

• How do channels from Ghost Poro and Demolish work? Do we just need to be in the required area for it to work or do we have another active to begin the channel?

• How long does it take for Aerie to return to the user after being sent out? Does the cooldown change based on level or is it static?

• Does Aerie work the same way as Nami's passive where her abilities just need to touch an ally to apply her passive?

• Do enhanced basic attacks count as an ability for the case of Electrocute and Phase Rush or are they still considered basic attacks?

• Is Scorch an instant damage or a DoT?

I believe that's all the questions I have. Thanks for helping guys.