Thread: Critique my workout for maximum gains

I need your help once again. I am 5'6' 157lbs. I have six meals a day spaced out at two hour intervals.And I am on glutamine,egg/milk protein powders(which I am ingesting 1gram per pound of bodyweight) and a multi vitamin. I am on a four day workout schedule which I would like you guys to tell me what you think.

Monday: Chest

Barbell Benchpress 12-10-8-6-10
Incline Bench 12-10-10-8
Flyes 12-12-10-10
Hammer Strenght benchpress 10-10-8-8
Incline HammerStrenght press: 12-10-8-8

Wednesday: Back

Widegrip Pulldown 15-12-10-8
Reverse close grip pulldown 12-10-10-8
Seated Cable rows 15-12-10-8
HammerStrenght Pulldown 12-10-8-6
HammerStrenght Rows 15-12-10-10

Friday: Shoulders
Behind the neck military press 12-10-10-8
Upright Rows 15-12-10-8
Military Press 10-10-8-8
Lateral Raises 12-12-10-10
Arnold Press 12-12-10-8-6

Sat:Arms

Standing Curl 12-12-10-10
Incline dumbell Curl 10-10-10-10
Preacher Curls 12-12-10-10
Hammer Curl 10-10-10 10
Tricep Pushdown (widegrip) 12-12-12-10
Ticep Pushdown(narrowgrip) 12-10-10-8
1 arm Pulley Extension 12-10-10-8

Please let me know what you guys think of my schedule and routines.

Even with bad knees, can low weight leg extensions, or standing or lying leg curls be added to give some strength/muscle to the legs?

Many claim behind the back military presses can lead to problems down the road if down over a period of time.