I usually always use a long acting test and adjust my AI as neeed for my goals. If I'm dieting, I will add more AI. Off season, I use less AI. When it comes to mass gains, long acting compounds are going to work better. If you want to use a new ester, maybe try Sust, which is a blended test. IT contains both long and short esters. I would break your injections down into EOD, because some of the esters are shorter. As long as you have your training, diet and rest in order, you should be able to make some great gains. If you wanted to take your gains a step further, adding in an anabolic like Dbol at 25mg for the fist 6 wks will add a lot.
Since the long ester in your Sust will take 3 wks to clear, you will want to wait about 3 wks past your last injection to start PCT. The whole outline would look like this. (Dbol optional)
1-12
Sust 500mg EW
1-6
Dbol
25 to 30mg ED
PCT starts 3 wks after last shot, 1 wk of 100mg Clomid or 40mg Nolvadex, then 2 more wks of 50mg Clo OR 20mg Nolva