what did someone tell you about it?
Typically, it is not advisable to use multiple methylated steroids. This is not a popular stack and I don't really think winny is gonna negate any water-weight from Dbol to make it worth your while. The only synergy I can see in stacking these two is that Winny works independant of AR's. Other than that, it's not gonna be anything spectacular, you might look into something else.