How to determine the RPM for all in?

What do you mean,"with vacuum 36"?

Vacuum timing is never part of the power-timing, cuz when at WOT, the vacuum falls to below the level at which the Vcan will come alive. And it's never included in the "all-in" figure. You can include it like this 20/32 +4
But if you are slowly reving it to 2200ish, and seeing just 36*...32* of which are mechanical,, that means the vacuum is only 4*. That is not nearly enough for a 214/218 cam in a combo like yours, if it was properly set up. However, with your mechanical so fast, I wouldn't change it until you settle the all-in rpm