Well I have taken many of the suggestions to heart and believe myself to haev found a reasonable solution; given the fact that I am old, on ZERO carbs and limited caloric intake I was doing too much and not concentrating on the core stuff. So I started yesterday and it was reasonably fast, just as intense and I mentally felt better doing it:
Dumbbell shoulder press x3 (15)
Latpulldown, inverse grip x3 (15)
Dumbbell bench press x3 (15)
Squats (ass to grass)x3 (15)/ Deadlifts x3 (15) (alternating, so since I did squats yesterday I will do deads Monday, etc.)
Crunches x3/Leglifts x3/Calf Raises x3
This way I work every muscle in the body with more or less big compound exercises at high intensity and also cut 15 to 20 unnecesary minutes out of my workout) Yesterday I finished in about 35 minutes...