I've used 25 mg of tren a day very succesfully. Just got back on it yesterday at 40 mg every day. Was running 400 mg of eq for the least 8 weeks, but now am cutting back to 300 mg of that.
In any event, I was bulking in the picture in my avatar (I'm bigger now) and was using 50 mg prop ed, and 25 mg of tren ed with 1 mg of letro eod at the time.
Tren is a very potent compound and for guys who are not mass monsters, one does not need a great deal of it in a stack to work wonders.