Young Gun

That said unfortunately captain big balls does have a point Legs/shoulders is to heavy a day and biceps/triceps too light a day to incorporate into a 4 day split.

Thinks about the percentage of your muscles worked during a legs/shoulders day and do the same equation for a bicep/ tricep day. Also there is always going to be an overlap in bodyparts and adequate rest periods that you cannot avoid in a 4 day spilt, due to the fact that pretty much anything you do before or after deadlifts will be worked again, but chest and then shoulders the next day isn't a great idea as your front delts will be worked 2 days in a row massively.

I really like traps/back day I don't think enough people do deads and traps on the same day personally.

Try

Chest/Tri's
Back/Traps
Shoulders/Bi's/forearms
Legs

Personally I do

Deads/Traps/Bi's
Chest/Tri's
Upper back/Shoulders
Legs

But this is as I'm doing a body recomp.

Your eating regimen is very good, ie you seem to understand the right foods to eat etc.. that said again your friendly neighbourhood jackass above has a point that you don't eat enough. You can't last 5 and a half hours on 1 scoop of whey and a handful of nuts.

There are a million things you could do to make your eating regimen for optimal in an ideal world but the easiest solution is take all the shakes you eat aside from post workout and add peanut butter, oats, milk, a banana and casein as well as whey and that will help you with the calories. If you want any more serious pointers on improvements feel free to ask