3 weeks till contest. When should i come off test to shred?

[Hugepecks91]

Im about 3 weeks out from my contest and im running test cyp 600/week. should i come off the last 8 days before my contest to drop the rest of the water and be really dry? Im running winny atm as well so im already really lean, i just want to look dry and grainy come contest day. May 24 is the date

Also i want to take diuretics about 7 days before my contest to get that extra edge. Can you stack diuretics and winstrol safely when used with caution?