i have seen it done( or at least clains of it being done on forums)... that being said my asfur has never allowed any angel from the pomacanthus family( koran and emperator) in the tank( 2 tries) but has never been an issue with other large angel family groups
my asfur was adult colors and about 4 inches and the 1st angel in the tank.. when i tried this and both of the pomacanthus angels had juvi colors and about the 3 inch range, the asfur is now over 6 inch, was it the similar colors of the juvis to the asfurs colors as a juvi that sparked WWIII i dont know but i added a scribbled angel of about 4 1/2 inch and the asfur never paid any attention to the scribbled