my scan time is 1 and expiry is 20, i solo mine a lot so i don't think it's my settings, i finally got a block but it seems people with lower hash rates are getting ore. i'll keep trying a few more hours, if nothing works out, i'll consider just buying.
Try with a higher expiry, the blocks have an average of 30 seconds and you have more than enough h/s to set it more than 30 seconds.
Lower than 30 expiry = easier to catch quick blocks (those that take less than 30s to find)
Higher than 30 expiry = easier to catch slower blocks (those that take less than 30s to find)
Quick blocks = blocks with less than network difficulty.
Slow blocks = blocks with more than network difficulty.
