This one's a bit slippery - As with all things gypsy, use consecutive downstrokes when ascending strings (I'll be covering this and other aspects of gypsy picking/technique soon). As for what's going on - This ii V I is interesting for two reasons. Firstly Moignard here approaches both the Em and the A7 from the perspective of the A7. This can be a useful way of approaching progressions you are familiar with, to avoid 'painting by numbers' and sticking to accompanying harmony