use it 2 weeks before start of PCT, or 3 weeks,
id dose high at first, then during the "down time" meaning the halflife of the steroid, il dose low (250-500 iu) for 2-3 weeks and start your nolva clomid pct while taking the last 2 shots of hcg to prevent lesions on testies from over use.
i would also consider tapering down on your gear. easier recovery.