Here is my current vibe/synergy list with Cage & Shujinko:
I almost picked up Johnny a while back just because of your enthusiasm towards the pairing, but I don't think he suits me. This is a pretty nice chart.
I've been really liking Conan/Shujinko. Not enough mu experience to put together a chart like yours yet; still getting cooked by plenty of the cast but Conan is scratching an itch I've been trying to reach for a long while with this game, along with Jinko's many buffs he's caught. (Ermac steals are always cracked, obviously)
It would be nice if Conan had a low starter but being able to easily restand all of my launches back into Ape Punch lets Conan take full advantage of Shujinko's own restand/crumple and scales the combo less so I can always end in Conan's restand which allows another Ape Punch.
With other characters getting this mid screen was tougher to make use of but jailing at +23 Conan can swing with any of his highs except f3 which works in the corner (though pretty tight) or just use a mid. His strings that end in duckable grabs can be filled with konquest kick or barb stance/some other special. If they tried to duck Conan's strings are timed just enough that Shujinko can be dismissed and resummoned to convert into full damage. Without meter or kameo bar Jinko gives minimum 350 damage from his humongous jab back into jailed restand, and depending on steals can get upwards of 50+%
still without spending bar. If Konquest Kick hits mid screen I can still reach with dash jab or f2, though definitely trickier.
Conan's buttons are also plus enough on hit that raw followups into a stolen move actually connect when you're out of punch/kick range, so things like f2 tipper into spear will combo.
I've only just begun experimenting with this but if they're armoring through gaps I can call Shujinko's ambush with similar timing when he would appear during summons and block instead. Is this something you've already explored on Johnny? Do you find it useful?
Shujinko also always gives a decent anti-zoning tool against relevant match ups and so far the utility has been fitting Conan surprisingly well, such as being able to convert from really far launches using stolen moves to create opportunity which I found to be pretty difficult with other characters apart from Ashrah's f2.
Conan can pick up even full screen launches depending on match up. Also can reserve my meter for crucial moments than relying on it for damage, and the EX into EX thing Conan gets with EXdf1 is a real round clincher due to the godly restand.
This character is really getting me back into the game.