Gel glue works pretty well but I have learned from reading other threads that you have to let it set up for around 30 seconds or so before you attach the coral.
I just got some rics from Ken as well and most had a little piece of rock attached to each. I used some LR rubble from my sump to glue glue them to in order to make placement easier in the tank. I dried off the piece of LR, applied the glue, let it set up, and then attached the ric before putting it back in tank water in a tupperware bowl. After about 10 minutes, into the tank with no problems.