I just do like a 45 acclimation in the bag. Acclimating is overrated. I've been doing this with all of my corals for over two years now. I would only do a drip acclimation if i was putting in a few SPS
My LFS friend says to float them for 15 and then stick them in. He said the less stress the better. He says the quicker they are in the water the better. Thats what I have been doing and so far so good.