I have a set of the YN622-C triggers, so I mount one on my camera, mount my 430EX II on the other and I have a working off-camera flash setup that I am pretty happy with. So, do I really need a 600EX -RT? Assuming I don't need increased range, can I get away with just adding a couple of more YN622-C triggers and another 430EX-II or two and have a multiple flash off-camera setup? The YN622C-s provide all the wireless connectivity I need, right?
Or does the 600EX-RT bring something to the table (again, assuming I don't need the extra power) that my YN622-C based setup cannot deliver? I just saw the Canon refurb 600EX-RT sale and it is making me wonder whether I need one?
Any advice would be wecome.