I've tried almost every mascara on the market over the years and the best one I've ever had is Max Factor Masterpiece Max mascara. Both my friend and I have been asked if we've been wearing false lashes when wearing them!
I also use clinique lash primer to make them look thicker before the mascara, and apply about 3 coats of mascara
I have tried all the mascaras on the market I love YSL false lash mascara but it is expensive and dries out in the tube too quickly. The mascara I keep going back to is L'oreal double extension. This has a white base coat and a black top coat . Makes lashes nice and dark and thick.