I'm an IFBB Pro and I follow the same diet too High Protein, High fat (healthy fats) and low carb diet when I want to keep my bodyfat levels low and look shredded.
By the way, maybe you already do this but keep in mind that high protein diet damages kidneys and control your creatinine levels.

99.99% of multivitamins are waste of money, time and health. I suggest you to buy certain vitamins/minerals that you lack and always do research to determine which form of that certain vitamin/mineral is absorbed by the body.
For example, we all lack magnesium and it's better to supplement with it every day but the problem is that most magnesium forms aren't absorbed. For example, when you buy magnesium oxide, you are wasting your money because body can't absorb it well, in this case, you better buy Magnesium Glycinate or Bisglycinate.
If you want to buy Zinc, you better buy Zinc Picolinate to get the most out of it.
If you want to buy L-carnitine, you better buy L-carnitine-l-tartrate. Or probably Acetyl-L-carnitine if you mostly want to take care of mental health instead of physical bodyfat.
By the way, the only multivitamins that I know is really good compared to others, is Pure Encapsulation's O.N.E™ Multivitamin.