im assuming by aro you mean aromasin. I would save the letro in case you really need it, you need some estrogen for growth and letro is strong. go with aromasin during cycle and for pct, 25mg ed usually works for me. Although, I normally dont run an ai during cycle unless i see signs of gyno. If you do run the letro I run it at .25mg eod. as for the caber in my experience I have never had to run it with deca and I have run some high dosages so I doubt you will need it.