I don't do hanging dips anymore. After several shoulder surgeries I just don't feel comfortable doing them. But I do bench dips after triceps extensions. Doing 3X25 I get more out of it than I ever did doing weighted dips. And believe me, I use to hang a BUTT LOAD of plates when doing them! Try moving your bench dips after your tricep extensions. They are higher rep and will give you a burn you wont believe..I think you'll like it.
Also, since you are supersetting those dips with flyes and flyes don't really incorporate your tris as much as benching and military presses do, you might find you don't feel as gassed when you start doing military presses and can work with heavier weights. You can lower the number of sets when doing your bench dips since you are bulking. But I promise you that doing them right after doing your extensions will literally kick your ass!