Hey dude,
Here's my take on "Non Reef Safe Fish." It all depends. You can do a huma trigger, copper band, or the angelfish, but BE PREPARED for him to munch on a few things prior to you weening the fish onto some other food. Then it's just a matter of keeping the fish overfed, but even then there's still risk.
Copperbands are sensitive but if you can get one that eats frozen and feed garlic in there it should make life easier.
In regards to Aiptasia - how bad is it? Peppermints work to an extent. They won't eat it unless they are starving. Chances are you feed your fish and they'll eat the leftover poop unless you get lucky. I know people say Aiptasia X doesn't work, but chances are they used it incorrectly in fear of bombing the tank you have to put A LOT inside the tank to make sure the entire mouth is covered and have to approach it very slowly.
I've used it MANY times over on my tank and other reefers' tanks and it has succeeded 100% every single time. If you would like to borrow some, let me know before you go spending a fortune. I am assuming you don't have too many.