Which one will help me win the most, help out my team the most or be the MVP the most? I have no idea which one to choose. Which ones should I do and it what order mabey?
Rogue because DMR is OP
MVP the most: Rogue or Stalker. You’ll win more rifle fights with less flinching and Stalker lets you see at least one guys location at a time.
Helping your team: Wheelman is guess, lets your Warthogs and other vehicles last longer.
Choose whichever one will compliment your play style the most. For example if you are a vehicle type player choosing Operator would be a wise choice.
The most tactical choice would be pioneer so you could use the fast track mod to help you get through the others. That’s what i chose for my first. Depends on whether you care about xp or not though i suppose.
How much extra xp does the fast track mod give you?
> How much extra xp does the fast track mod give you?
between 10 and 30%
They don’t actually give you a benefit while using them.
Upon completion of a Specialization, you unlock the mod item which can then be used in Loadouts. People seem to be confused about this.
> How much extra xp does the fast track mod give you?
Not really sure. After a winning, positive K/D, and in the top 3 on the board, Fast Track gave me 415xp 
In Spartan Ops, getting 5000, it added 1000…
but they lead to benefits 
here is what they do guys
The reduction of flinch from Rogue seems helpful.
So would rogue be a good choice?