
Best of luck... and I'm sorry but that is about all I can tell you. It has been my experience that the gluing method doesn't work because they naturally will produce additional slime and break free. The rubberband is the best, although it's also been hit and miss for me. They will sometimes split prior to bonding with the rock. I have a nice frag in my tank now that I have had for about 6 months, well I see it from time to time and I try to mount it again, I've had no luck with mounting and let it go hoping it will attach somewhere on it's own.
Soft corals are tough, unless it's xenial, it seems to attach over night, by the way I have some if you want to give that a shot. Good luck,