SebaeHope
I agree with you that a lot of literature regards Flame Angelfish as a hit or miss in a reef setup. Some folks have good luck and others don't recommend putting them in with corals.
I've had a Flame in my 55 reef tank for about 8-9 months, and so far it's never picked at any of my corals that I know of. It does nip at the live rock now and then, and I keep some nori seaweed on a clip. Occasionally it picks at that.
Flames are beautiful fish for sure ... colorful and very active.
I'd guess that for every hobbiest that successfully keeps one in a reef, there is a person that ends up getting one that picks at everything. Of course this is just a guess.
Don't know what else to say about Flames, except again they are really cool fish !
Brian