6-OXO is insufficient for a proper PCT. Either acquire Novladex and use at 40 mg per day for 2 weeks, then 20 mg for two weeks or get some Rebound XT and use that accordingly. I'm sure that either is easily acquired for around the same cost as the 6-OXO.
Are you sure you want to run the SD that low? Most people need a little more to respond properly to it, and best gains seem to be found from week 3-4 on SD. Also, there's no reason not to run milk thistle during cycle. Just take it at a different time than the SD.
If choosing between Novla and Rebound with easy access to either, Novla has a slight positive effect on lipids/cholesterol and Rebound may have a negative effect on lipids. SD is hard on lipids and good HDL cholesterol. Rebound has been shown to possibly reduce or eliminate mild gyno, though. SD is not really known for causing gyno effects, but raised estrogen levels may occur after the cycle, which is why good PCT is important here.