To improve timing is it better to just go with the flow and take whatever opportunity your partner might give you OR choose a submission and just go for it all day long???
What are you trying to improve? Are you trying to work on your timing when transistioning from technique to technique or are you trying to improve your timing on a single technique? Answer that question for yourself and it will tell you what you need to do.
Thank you Bolo!
For overall timing, I'd just recommend sparring. Just make sure that's not all you do. I know of some guys that are practising their "UFC" moves in their basement and pretty much all they do is spar. You have to practise your techniques and drill them, too.