Smash fish oil at 20-30grams a day. Eat 3 meals a day high in protein and low in carbs and 2-3 protein shakes, keep carbs to veggies and maybe earlier in the day some rice, yams, or oatmeal but if you need lower BF lower the carbs....increase protein with shakes, and increase EFA intake. A few handfuls of BCAAs prior to training and if you got the cash in between meals. Depending on your training, hit intervals hard, way more bang for the buck than steady state cardio. I do not know why folks are still bent on "cardio", do energy system development, ie intervals, much less time, burns way more calories (EPOC) and wont hurt your speed or strength with the weights. 10 or 15 minutes of intervals or strongman type circuits after your lifts 3-4 days a week will do worlds more for bodyfat loss than cardio.
As for Tren, I am a total newbie but have done two 5-6 week blasts in the past year with 75mg Tren Ace EOD, no caber, and last run was with about 150mg Test Prop and 100mg Mast Prop EOD. No sides really at all. So much so I feel like running it again this summer at a higher dose and with caber (got some on hand now for next run), but after reading how harsh it is I guess I will wait and just run Primo + Tbol + test Prop this summer and finish up with some Var possibly.