You could do 2 scoops if you want for each protein shake, just understand that if you want to prolong your protein powder that won't be the best idea.
As far as tips for not being sore, first that is a very broad question which is hard to answer. Are you asking this because you feel you will be more sore due to your decreased protein shake consumption? You do realize that milk has the same protein in it that protein powder blends have in it, right? (Whey protein composes 20% of milk, with
casein composing the last 80%) Not trying to go off on a tangent here but I find it funny when people think that drinking a protein powder will make them jacked / train harder / etc, where as from a nutritional stand point milk is not all that different from protein powders (okay okay, to an extent).
I would train like you normally do, maybe not go to failure on every set (which you shouldn't be doing anyways), get a full nights sleep, and you should be set.
