I will be starting my next cycle which will compose of

750 mg/week Test C broken down into 2 injections a week
600 mg/week Deca Durabolin also 2 injections a week

What do you recommend me using for the AI? I have arimidex already on hand. What about Letro? I have never used Deca. In my previous cycles, I have used arimidex. I don't generally have any sides but acne and oily skin. Any help would be appreciated.