I think .5mg eod is way overkill for 250mg/wk. especially for a first cycle. You will never know if you dont need an AI if you dont try your cycle without it. No reason to run it if you dont need it. As brandonp005 said, he is very sensitive and needs it. Myself on the otherhand could run a 1000mg of test a week and wouldnt need an AI. Try it without first. No point wasting it during cycle unless you find out you need it.