Here is my take. Vacuum advance should not advance timing at wide open throttle, or at idle if using ported it timed vacuum source. The 22 degree initial timing seems too much. With only 10 degrees of RPM advance, you are stuck with that, to get 32T. By opening the RPM advance slots to get 8 more degrees, would let you to set the base timing at 14, and get the max RPM advance at 32. The adjustment of the vacuum advance at the nipple allen, changes only the minimum vacuum required for start of vacuum advance changes. The total vacuum advance can be limited, by adding stops on the linkage arm. Too much vacuum advance results in surging when coasting down, and over advance at light load. Insufficient, or no vacuum advance may lead to poor economy, sluggish throttle response, and overheating of headers, and engine at cruise speeds.
With this said, some lock the timing at 32, some use mechanical only, some like early VW used only vacuum control. Others think knock sensing solves all timing issues. In reality, knock sensing controls are quite specific to engine dynamics. They do limited range adjustments, in conjunction with spark control tables.
And a very few spend time tuning to get timing nearly correct, or use modern engine management controls for perfection.
