Theory crafting
played around with it once and found that you would have to have really good timing on the share to get the phantasm to be effected by the full boons during their attack. when you did tho it was worth it 6 might=~1000+ extra damage on the duelist attack didn’t try it on the other phantasms.
as for hidden boon share would probably look something like this where you where as reliant on the might stacking as the clones. possible to get a consistent 20+ with it.
http://gw2skills.net/editor/?fhAQNAsaRnsISjaWoGGoB3aGB3IM9UT0ZHzLXAA-TJRGwAAODAJeEAg2fAaZAA
will try and see how well other phantasm get effected by it.
Quick note: Phantasms only benefot from might on the Mesmer.
Ive used altruism runes with MoRecovery to grant instant fury to phants. They dont need vigor or swiftness, retal and protection are the tricky ones.. (sorry for typos. Cellphone)
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retal helps but yea ik they dont need others, thats why i was straying from PU but PU does give good defensive while your phantas hamemr away