Air-fuel ratio schooling needed.

I'm in the process of tuning my direct port efi right now. I'll preface by saying I'm not an expert, but rather sharing what I have done so far and have had pretty good success.
Idle AFR: Initially it was running around 13.5, but it still smelled like it was running fat. Once I brought it up to around 14.5 it doesn't stink up the garage anymore and it seems to be happy. That being said, I have sequential port injection, not the throttle body style like you. You may have to run it a little fatter but I'd bump it up to around 14 and see how it does. You might even want to try 14.2 range. Does the Sniper system have temperature based enrichment?
As previously mentioned, you should be fine going leaner on cruise RPM. I currently have mine around 15-15.3 for cruise AFR. I think you are fine with the wide open settings right now, but you may be able to go up to 13. In reality, how often will the engine see wide open throttle? Likely for only a few seconds, so it doesn't really matter. If you were running a power adder, I'd definitely recommend keeping it fat up top.
I'm amazed at how clean the plugs and tail pipe are on my car. Almost zero soot in the tailpipe and the plugs look as clean as plugs in a new modern car. It's also nice not smelling like exhaust every time I drive the car.