I personally wouldn't ever do anything that can aromitize without arimidex/liquidex.... I think you might want to throw it in at .5 mg/day or EOD to keep water retention down and keep chances of aromitization related gyno at bay...
By the way, you're using omna. I'd carry the winny out to week 13 or maybe even 14 to get your clomid therapy down to a Tee.
Remember omna is very long acting and will be in your blood long than cyp/eth.