What do you mean "diet is pretty good".....usually that means your diet will hinder your gains.(save for beginner gains, and teens with too much Test lol)
How many gram of protien?
whats your carb and calorie intake?
How many calories a day you planning? This is a bulk, your going to have to go above maintenance.
How long have you lifted?
Have you lifted long enough that supps will help because your gains are slowing?