400mg/wk test is a low dose for mass building, especially for someone your size. I would say definatly have some arimidex/liquidex on hand. The other option would be to just drop the dose to like 200mg week, that should be anough for labido and greatly reduce bloating....if any, but we are all different.
As for diet and cardio, fina seems to be real good at adding mass while cutting. If you wanna bulk, go ahead and eat, if you wanna cut, trim out about 500 cals a day or do cardio to burn an extra 500 a day, or a mixture of the two. One thing however, fina can cause some ungodly pumps which may make cardio hard, you will have to experiment a bit.