I used to cruise at around 400mg/wk, but the last two cruises have been lower (200-300 mg/wk). However, once you factor in the ester weight, I don't think that 300 is excessive. I also use a small amount of either IGF1 or GH during this time.
I taper down as well, then run the lowest dose that allows me to retain gains, and feel good. The longer I cruise, the better the gains on the next blast.