Point B exactly at 61.8% retracement of XA wave
Projection of external BC must not exceed 1.618
Equivalence of AB = CD is the most common
Point D at 78.6% of XA retracement
Point C must form inside of the range between 38.2%-88.6% retracement of AB wave.
I don't allways use my fibonacci tool to measure out all the levels and I agree with you that the Bat pattern would be the more appropriate pattern in this case.