if that split is working for you then go ahead and keep doing it. I would think doing something like: chest/bis, quads/hams/glutes/calves, off, shoulders/tris, back/traps/calves,off, off. This is my split and I just think with a 4 day split you would be able to do a little extra cardio w/o having to worry about losing as much muscle. I dont think the split is a huge deal, especially since you dont have too much weight to lose. I think it all comes down to how many workouts and sets you do per body part. for example, for legs; start off with leg extensions and do 3-4 sets and 8-12 reps. then go to squats and do 3-4 sets and 6-10 reps. then finish it off with some light lunges, say 3-4 sets and 10-12 reps. so in other words, for each body part do one heavy movement (squats, BB bench, deadlifts, military press) and then do 2 lighter movements. this is the way i do it, but everyone is different. also, this is for a natural cutting phase. if you are not natural then that changes everything. | 
