I don't know if this has any tactical application at all.
I think, using RAW, that it's possible to skyleap squads other than swooping hawks, using Baharroth.
Skyleap states that the exarch and his unit are removed from the table, and deep strike back later.
Baharroth, as a Phoenix Lord, is an independent character, and with the disciples rule, he's not allowed to join aspect warriors other than swooping hawks. But, this doesn't stop him from joining a unit of guardians, or wraithguard, or harlequins.
So, if I join Baharroth to a unit of wraithguard, can I skyleap them all off the table?