Have you had a conversation with the cam designer yet? I'd let that person guide you the most towards a compression that can work well. Tell them what heads, hp(block) limits you have, the main factors etc, and rely on them to guide you to the best combo. I'd bet most would suggest a compression in the high 9's, like 9.7, but few would recommend 10:1 or more. Pushing the compression up does improve the all around grunt, normal driving, and limits boost which can be good for the block. Most people calculate compression ratio from basic specs of their parts. That ends up with an error I hear, of easily half a point off. You can do that for the parts you have, and use those for the cam designer, and deciding on tweaks during the build. Such as the head gasket, quench, head shaving, block decking etc.