I would just start at 25mg eod if you know you are not prone to sides and increase to ed if needed.
Alot of guys in here say better safe than sorry and do 25 ed and I can't argue with that if you are concerned (some even do 25mg 2x a day).
I am doing 12.5 eod for the most part and no issues but I will increase to 25 mg ed if I start to see bloating or water retention in excess. I try to time it so I do not dose aromasin on bench day so I have maximum joint lubrication for that lift...it's the only one that has been tough on any of my joints (on last PH cycle).
Well hello Mister Fancypants. Well, I've got news for you pal, you ain't leadin' but two things, right now: Jack and shit... and Jack left town.