I do traps with shoulders and I never do the same exercise twice in a row.
If anyone wants to try a great trap workout try this,
using dumbells start with a weight you can shrug for 20,then immediately grab a lighter dumbell like a 35lb.start from the top of your shrug{traps up near your neck,not relaxed}lower the weight no more than an inch to 2 inches.do 12 of these then rest.
thats your 1rst set.then continue your sets working with higher weights with your first part of the set.always keep a light weight for the "squeeze"or second part of the set.
I usually start with 80's then work my way up to 130's.obviously the number of reps with the heavy weight go down but not the number of reps with the "squeeze" part of the set.
let me tell ya this is a workout that gives your traps a KILLER pump
obviously this takes time and it's not something you would do every trap workout but it works great for me!