It has been soooo long since I've been on this forum. Just been so busy with school.

My routine has plateaued. I'm not making any weight gains. This my routine as of right now. I've been doing this routine for about 11 months:

Day 1: Chest/Biceps

5 sets 8 reps 205lbs (flat bench press)
5 sets 8 reps 225lbs (decline bench press)
5 sets 8 reps 235lbs (fly machine)
5 sets 8 reps 195lbs (pec deck)
5 sets 8 reps 45lbs (standing bicep curls)
5 sets 8 reps 120lbs (preacher curl machine)
5 sets 10 reps 30lbs (cable curls)

Day 2: Shoulders

5 sets 8 reps 65lbs (seated dumbell press)
5 sets 8 reps 170lbs (shoulder press machine)
5 sets 8 reps 90lbs (upright rows)
5 sets 8 reps 25lbs (front lateral raises)
5 sets 10 reps 25lbs (side lateral raises)

Day 3: Lats/Back/Triceps

5 sets 8 reps 170lbs (seated row)
5 sets 8 reps 195lbs (lat pulldown)
5 sets 8 reps 230lbs (hammer strength pull down)
5 sets 8 reps 270lbs (hammer strength ?)
5 sets 8 reps (bench dips)
5 sets 8 reps 30lbs (concentration tricep extensions)
5 sets 8 reps 75lbs (tricep pushdown)
5 sets 8 reps 95lbs (seated tricep press)

Day 4: Legs/Abs

5 sets 8 reps 315lbs (hack squat machine)
5 sets 8 reps 190lbs (leg extensions)
5 sets 8 reps 130lbs (leg curls)
5 sets 30 reps (decline crunches)

Then I'll repeat Day 1,2,3 at the end of the week.

I'm not taking any creatine just protein after every workout. I'm gonna post my diet in the nutrition section.

I'm 6'2" 200lbs.

Any suggestions on my routine?