Had one for about 6 years in a LPS tank years ago.. We didn't keep Zoas back then. Never had a problem. In THIS century, I had a Flame in my SPS tank and aside from the occasional exploratory nip at a zoa or two, no problem. Overall, model citizen. Then one day, up and dead. Go figure..
I do agree with several above that keeping them fed and not thinking about your corals is key. But........ There is ALWAYS a chance with ANY Angels picking on corals/Zoas. Personally, I like em, and I keep em.
Go for it..