Var takes I wail to kick in and is very light on the liver because it has low androgenice properties.
With that being said I would only run var on a cutting/lean cycle. It helps with the body's aperance more then anything.
I run my cutting cycles for 8-12 weeks and run my var for the whole cycle, start to finish.

Winny is a compound that is good for drying out and solidifying gains. It is usually ran in the last 4-5 weeks for a cycle.