The best for harm reduction is equal time off as time on. I have ran Adrol for 8 weeks, 50mg daily, and my blood work didn't budge out of normal range for anything, including liver tests.
If you are using PWO for 3 to 4 days a week then you should be fine running 6 to 8 weeks. Test your liver enzymes and other bloods cya though. Adrol isn't the liver destroyer it's made out to be, IMHO.
I am about to add Adrol back into my stack at 50mg daily, 4 on / 2 off - and I'll run that cadence two to three times before coming off orals for a good 8 weeks or more.