Per-group (URLs that operate within a 10% optimization range) cached css, generated by source tree + crawl + ongoing visit data? Edit, also pls send me a pony.

Per-group (URLs that operate within a 10% optimization range) cached css, generated by source tree + crawl + ongoing visit data? Edit, also pls send me a pony. Optimzations have a few audiences, the primaries of which are the visitor and the developer. Source tree prunes ("developer audience") not addressed in my off-the-cuff pipe dream above