+1 on the spreadsheet, but you kind of have to take it with a grain of salt since everyone's angel is in a different environment/tank and taken care of differently.
I tried to gather information a couple of years ago that expanded upon this (asking questions like what/how much people fed each angel, if they quarantined first, etc.), but some RC people were too closed-minded to even have a discussion on the "reef-safeness" of some angels, and the thread got too far off-track to ever get legs.
I personally feel that if you feed them enough (at least three times per day) of the right foods, then most angels will leave most inverts/corals alone. Some are more likely than others to revert to picking, but I think the spreadsheet is useful in that it shows which ones can venture in that direction more/less frequently than others.
As for quarantining, dwarf angels don't seem to be bothered by copper treatment as much as the larger angels. I actually just recently completed treating my Potter's Angel with Seachem Cupramine, and he didn't seem phased one bit throughout the whole process. I think the key with treating (particularly with more sensitive fish) is to start dosing in small amounts over a period of several days (not just a couple like the instructions say) until you've reached your desired Copper level.
Good luck!
-Chad
