Cloak of Spiroc Feathers MQ
 

as title, gimme offers

sorry to burst your bubble, but you can't MQ sky items.

You can MQ the completed sky cloak for the turn in of cloak + slime blood + eye of inny + journal in timorous deep

The 2nd post needs more clarification.

Yes; you can MQ sky items. Just did a MQ for ranger epic swirling color sphere last week.

Is the subject cloak MQ proven to not work?

You cannot MQ the quest turn ins *in* the plane of sky to receive the item rewards. But in this instance it's an MQ of the completed sky item, but turned in elsewhere, which will work.