O.k. ,first change the push-press for a standing military press or a clean and press ,reason being that push-press is a technique to overcome a sticking point and as much a quad exercise as upper body .Same as you using rest/pause on your current deadlift program ,no wonder your pushed for time resting 3-4 minutes between reps I wouldn't recommend resting that long between sets .Strip it back to a good basic lifting programme ,damn I even had to Google Zercher,but I like that your doing front squats :)