Why do people take aery on champs that don't have abilities to be cast on allies?

Poke damage

1. Aery is a guaranteed hit unlike comet which is dodgeable.

2. Aery is almost always going to have a lower downtime than Comet and thus can be used more often.

3. Auto attacks apply Aery, unlike Comet.

So which are some non-enchanter champions you can consider taking Aery on? Almost always champions with heavy DoTs so they can proc Aery two or even three times in a skirmish or fight. Stuff like , , . You can even take it on some Melee Lane bullies like .