I wouldn't say Braydon Coburn and Nicklas Grossmann do it successfully - I think Erik Gustafsson can be a bona-fide top 4 d-man, he should be up with the Flyers permanently
The problem with the Phantoms is their goaltending has been shaky and they haven't had many stud forwards who could score a ton - also, some players play better in the NHL than the AHL
the one's that do and have long term success in the NHL are the one's that dont feel like they should have to play in the minors. high profile draft picks and such. not undrafted free agents and late round picks.
and how quickly you forget them shutting down teams late in the season and in to the playoffs a few years ago. they were a bonafide shut down pairing against high caliber NHL talent. not struggling to stay afloat against minor league talent.