The obvious solution is stop using Win10. That'll make literally everything better, not just mining.
Windows 10 sucks forever. Unless you've messed with the stick voltages (or there's no fan on them), there's no electrical reason they'd run that poorly. Every stick is tested to 200MHz on stock before it ships, and most of 'em will do upwards of 400MHz on stock voltage if they're kept cool. That's why I put a fan header on the hubs.
Please tell me you got a fan on 'em.