I did this 550 killer reps workout in the morning. Unlike last time, I managed to complete the whole thing, though it was quite haphazardly towards the end. I couldn't do the full side plank rise, so I used my elbows to do it. It was still hard.
Time I completed this workout was 36:29.
Last time I only did up to side plank lifts and called it a day.
A little improvement: I did the walk up push ups on toes until 30 reps (with mini breaks in between) then went down on my knees to complete the full 50 reps. Last time I did only 20 reps and went down on my knees.