First, let the player know that you're going to be using circle stream jumps very early on. IMO the best way is to shape a stream very suspiciously...
http://bombch.us/BsVCOr just introduce them REALLY early on. At the start of a map the player will be trying to figure out what style the map is in, so let them know ASAP.
Don't introduce them like, two minutes into the map. Think first 30 seconds, preferably first 15.
Second, start with the easier variant, circles into sliders. Sliders are naturally more lenient, so the player can finish up the circle normally, then hit the slider far later.
http://bombch.us/BsVNOnce the player has completed one of these they'll be on edge for the rest of the set and will be prepared for the circle to circle variant.
Third, try to keep circle stream jumps from blue to white/red, not the other way around. They work best in even groups, not odd groups.
Do these mostly:
http://bombch.us/BsVVDo these infrequently / never:
http://bombch.us/BsVX
Fourth, set your OD lower than usual. The player is going to be purposely hitting circles late, so set the OD lower to compensate. Don't circle stream jump on OD 9 unless your BPM is really really damn low.
The earliest map with this gimmick that I know of has OD 5 (!) which is way too low, but you get the idea.
Use OD 7 if you're having trouble choosing. OD 7 only hurts PP, and the circle stream jumps will be breaking PP anyway.
Oh and one last thing, don't circle stream jump into a buzz slider.
Buzz sliders already have to be hit early to avoid combo breaking off of a repeat.
If I break one more time on the jump into buzz in sionKotori's dopamine diff I SWEAR I'm going to brkraowuehawehakwejha
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