Var will definitely help do that . but its the most expensive way to do that . things like Proviron , Mast, and Winny will also decrease SHRonin but at a much lower price point (especially the Winstrol ).
Keep in mind that SHRonin binds up DHT more then any other hormone . so while lowering SHRonin will free up a bit more test, it will also free up a lot more DHT (that could be good or it could be bad depending on your situation)