Need help with rules/mask - WPA2 handshake

Hello guys!
I've been using oclHashcat with my amd GPU for a few months but only with my little understanding of what I read hashcat wiki.

Since I've only tried basic rules, I now need your help to ensure that I apply the right restrictions(if possible) and also improve my knowledge of hash cat.

So this is the information that I have to able to obtain the password of my wpa2 handshake via brute force:

• Its exactly 10 digits long
• only contains UPPERCASE letters(A-Z) and numbers(0-9)
• Its 3/4 letters max and the rest is numbers
• Not 100% sure but wanted to filter that ins't possible to have 2 letters in a row
• Valid examples: A1B2C3D567 / 12A3B5678C
• Invalid example: 12AB34567C
  

So I want to convert,if possible, some of this information in a mask and that would make the process alot faster

Right now the only code that I have is this one:

Also I'm not sure if this randomize the letters position, or is only fixing the letters in the same spot like this :A0B1C23456 / D0E1F23456