Steel or aluminum heads? If you're running steel heads, you've got too much DCR either way...no more than 8:1 is recommended, and a bit lower if possible. Aluminum heads can support another .5 compression. Installing a thinner head gasket will increase compression, I believe that was a typo and you're thinking of using a thicker gasket to lower your compression, and thereby your DCR. The trouble here is your quench is also an important part of the equation. Proper quench (around .040 give or take .005) will cool hotspots in the combustion chamber, allowing the compression ratios mentioned, as well as keep the fuel/air in better suspension.
Glad you were able to figure the dots on the crank gear out...my brain is getting frazzled.
Dan