People that know me know that I do not flame, BUT your trainer is not too with it IMHO.
NEVER superset triceps and chest , back and biceps. ....triceps are already the weak link in chest work and biceps are already the weak link in back work and what you are doing is making the situation much worse.
If you want to do supersets it would much better to do an isolation movement followed by a compound movement for the SAME muscle groups ie: like pec deck, and then jump into a chest press of some kind.....then the pre-fatigued chest can be pushed further by fresh triceps. The same could be said for back....do an isoaltion movement first like a machine pull over and then do a pulldown movement. OR...superset opposing muscle groups like bicep and triceps or chest and back.
Please read my sticky post above on proper steroid free training.
You need to stick to the big basic movements and learn to move some heavy weight for reps in strict form and THEN you will see shape form on your frame.
Since you are heavy you could do weights in a circuit manner with little rest between exercises, but don't do your super sets above...just push very hard on one set of say 8-10 machine exercises with next to no rest between sets and do the circuit a few times.
CURCUIT example......
Leg press, leg curl, leg extension, chest press, pulldown or rowing movement, overhead press, curl, machine dip, toe press, crunch, back extensions(hyperextensions). Train to failure on each exercise and do the circuit 3 times...don't rest between machines but don't rush too much.
BUT personally I think you should use weights to build as much muscle mass as you can(won't be very much because you are female and not on steroids so don't worry about getting "too big")
Train like I recommend in my sticky. Then the extra muscle mass will help boost your metabolism.
Do cardio 5 times per week.....try fast walking on a tread mill on a steep incline for 30-45 minutes at a crack as this is easy on the joints which may be a concern of yours since your need to loose weight.
PLEASE REMEMBER THIS...Diets DO NOT WORK ....PEROID! You will loose weight on a diet BUT you have not trained yourself to eat properly and you will gain it all back plus some. Try to eat a healthy diet, low in saturated fat and refined carbs and try not to eat in the evening. Cardio is a must and must become a part of your life. Weight Watchers is a very good organization.
You are not that heavy BTW.....at your height you should probably weight about 130-145 depending on your bone structure and muscle mass. Try to get to 20% body fat and you will feel and look pretty good....15% will look even better on ya.
Good luck
RG
RG