The soothing mists mechanic is nice, but you cant use the instant heal too much.
Monk tank healing does not hold a candle to disc tank healing. Also paladins are just incredible on the tank. Beacon duplicates all their aoe healing on the tank. I think disc is the best tank healer by far though. Throughput is sick and has awesome CDs.
Right now the perfect healing team for 25mans has a ton of monks and a pala or two.
Actually I take that back. Some encounters favour other classes, including priests