I´ve been using a A:B:C setup with the YN622C and a few softboxes with great success. I quite like my results up to now.
Now I got a Sigma ring flash (140EX) and was thinking about using it attached to the lens or maybe even remote to get a more pleasing catchlight.
Do you guys think this is going to work well? Will the direct ligth from it attached to the lens get too harsh? Perhaps ruin contrast?