You "screw it" bud's speak some truth. Focus on building muscle mass first because your eating plan of hi-protein and moderate per day carbs seems well suited for your needs. Maybe having the good carbs to 200 max might be a better range for you, though individual metabolism may determine that. So you may want to experiment a bit to see what is best for you. Extra fat loss should be handled well with all this. No need to do something that may be self defeating as trying to lose fat before gaining muscle.
If you think you need extra cardio (which you probably don't looking at your training protocol) I might suggest interval training rather than 25 minute or longer bouts of cardio. Lot of BB'er seem addicted to endless cardio and wind up looking like skinned rabbits when the whole idea of training is to build muscle mass. . Many forms of interesting interval training, but would suggest the Tabata method for a start. Short and to the point sessions, taking only a few minutes of training time.
SS's work great for some, not so much for others. For example, Arnold S. did the BB row & bench SS's of 10 sets or more on a regular bases. So have many other top men through the years. With SS's, Tri sets, Quad sets, giants sets, one & one half sets, 8X8's, GVT, etc the idea is to keep a fast pace with a moderate weight, the whole workout. Others find success with lower sets like 5X5's,or hardcore power BB'ing, for building ultimate muscle mass. One good thing about keeping a good pace up doing a workout (45 to 60 seconds rest between sets & exercises), it will encourage body fat loss. Not quite sure what is meant by "cool down" after a workout, but I guess you do. Good Luck
