5.9, max safe compression?

EQ heads, sealed power 11cc dished pistons, .020 overbore, stock stroke, can set deck hieght at .050 in the hole with a .028 gasket as is, or deck it some for better quench, if it will tolerate higher compression. With out decking the block, it works out to 9.6/1 compression. 93 octane BP gas is what I can run, average DA is 2000 feet or more, local elevation is 1,000 ft, humidity is usually over 50 percent. Cam is 224 @ .050, 276 @ .006 hydraulic roller, will be in at 106. How much would I dare increase compression? At .050 quench, compression would be. 10.5/1?