Static compression is a calculation of volumes, and has nothing to do with valve events. Dynamic compression changes throughout the entire rpm range of the engine, it changes with temps, it changes with lash, it changes with air density...it changes all the time, and that's why they call it "dynamic".
There are 12.5:1 engines that run 93 and are fine, and there are 10:1 engines that can't run 93. Forget about dynamic compression and build the engine with the static in mind. If you're going to run 11:1 on 93, you need to minimize any chance of detonation. Polish chambers, blend piston domes, keep the quench as tight as possible, good ring seal (any oil in the chamber is death when on the edge of detonation) and most of all, good timing and mixture. You should look into a cam grind that will work best with your combination, but preventing detonation when on the edge of your octane rating is going to be more in the prep. and maintenance of the combustion process than anything. You could also drop your compression half a point and not give up anything.
FWIW, I just finished a pump gas 540 (top end) that made over 900 HP on 10.7:1 compression @ 6200rpm. I'm not saying you can do that with iron heads, just illustrating the potential for pump gas if everything is right.
As usual, this is just my opinion. YMMV
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