Well damn! you really are unlucky with injuries. I would still continue to train if i was in your position, but any exercise that puts any strain on your shoulders, you should do almost weightless. Pretty much just using the bars. This essentially and unfortunately includes pretty much your entire upper body. Try to stick with a light compound exercise where your shoulder is concerned, like military presses and when you do muscles like chest and biceps, try to use a light weight and isolate it as much as possible.
Anyway, good luck with your injuries, mate, i'll say a prayer to the one true god, Arnold Schwarzenegger
Yeah do like your example. I was thinking something else but your example is better. It's called progressive overload and its one of the best techniques for building muscle. Also sorry for the late reply, it was midnight for me at your last message.