Opinions needed on which musclegroups I work together on certain days

[Muscle_N_Money]

If you had one choice out of combining these musclegroups on the same night, which combo would you choose( for size).

Day 1 Day 2 Day 3
Chest Back Legs
Shoulders Biceps
Triceps

OR

Day 1 Day 2 Day 3
Chest Back Legs
Shoulders Triceps
Biceps

OR

DAY 1 Day 2 Day 3
Chest Back Legs
Triceps Biceps Shoulders

OR

Day 1 DAY 2 Day 3
Chest Triceps Legs
Back Biceps Shoulders

Or using a 3 day cycle to complete the whole body how would you scramble the bodyparts together? I am only mentioning the main musclegroups. Please don't add traps or neck etc into the routine because I work the small bodyparts with certain excercises. Thanks In Advance

Some info on me :
I have 10 yrs training under my belt (powerlifting/bodybuilding)
Coming off a 2 year layoff
I am aiming for size more than strength

 

[SoreArms]

here is the most basic split, whihc I'm sure you already know

Day 1-chest and tris

Day 2-Back and bis

Day 3-legs and shoulders

question:
Why are you working all you major muscles (back, legs, chest) on the same day and then splitting your minor muscles (bis, tris, shoulders) over two days?

 

[treet0ps4]

i do a 3 day split

legs

chest/tri/shoulders - b/c on chest, tri and shoulders are worked partially

back/bi - b/c on back bis are used indirectly on most movements

 

[Repard]

I do the same type of workout except I look at it as push type and pull type for upper body.

Push - chest, tri's, shoulders

Pull - back, bi's

Legs