I recommend UDCA, since you are already using a controlled substance (Clomid), it shouldn't bother you to get the added insurance of UDCA for liver and cholesterol.
Also, if the potency of the M-drol is good you shouldn't have any problem finding massive gains on just 20mg/week. 30 is fine, but no need to go there is 20 is working.
Lastly, you shouldn't see gyno from this. It doesn't aromatize into estrogen. Just make sure you have a strong AI like Arimidex, Aromasin or Letro. I personally prefer Aromasin over the other two. If you use an AI during PCT (which you should), there is no need to taper. If you use Letro or Erase you have to taper since they do not permanently bind to the aromatase enzyme.