I have used Sak for all of 20 minutes, but Sakura/King looks to be very potent. Both have solid neutral games and King is the hardhitting close ranger Sak looks for. As for more specific synergy:
King does huge damage off launcher and can raw launch off the juggle, giving Sakura a 320 meterless combo extension from c.mk st.hk she can roll reset afterwards with mk tatsu.
Since King can also Raw launch off his own juggles, i can tag effectively without meter, saving it for EX konvict kick and tc Sho shenanigans. Also lets me pile on the launcher activation gems.
On H sho and tatsu on hit King can go into knees, on block he can safely go into his elbow rush mixup.
The only real downside I have found so far is that Sakura’s launcher is low, so King cannot go directly into knees with it, losing 40-50 dmg every tag in. That and both have risky antiairs and poor reversals. Pfft, screw defense.
I am sure I can find some King into Sak synergy once I explore her more, I definitely plan to.
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