KMST 1.2.411 - Phantom

A interesting idea, if you have two phantoms, the entire party could have a whole bunch of skills.
(Assuming that if Phantom A buffs Phantom B with say...SE, then when Phantom B buffs Phantom A with SE, when they change their skill, does either phantom's buff remain?)
Even if not, two Phantoms could buff each other, although from the party perspective, it would not be that good of an idea.
Rage,Meditation?, Haste, Advanced Bless, SE, Time Leap?
Also, does skills cooldown continue to cooldown when not equipped?
Hmm so many questions..