Are you concerned about temporary weight gain or more permanent solid tissue gains?
There are several types of weight. Water. Fat. Solid tissue.
Water is mainly controlled by the steroids you choose and carbohydrate intake. It is also very temporary and goes away when you withdraw the steroid that caused water retention or you lower the carbohydrates.
Fat is completely up to you, your diet, and your cardio.
Solid tissue is also going to depend upon your diet. You just are not going to add a lot of weight without a lot of carbs making glycogen and pulling water into your muscles.
Since you are not a first time steroid user, it would be surprising if you could actually add more than 5-8 pounds no matter what you do.
What I mean is, you may shoot up 20 pounds during the cycle, but after the cycle, when the water drops off, the real weight retained is not going to be even half of that.
But My Suggestion:
You could, of course, go on a cut.
I get stronger for at least the first couple months of a prep. I have to get very, very lean before the strength gains stop. And, I weigh less each week instead of more.
So if you went on a serious cut, like a bodybuilder prepping for a contest, you could get stronger and weigh less, not more, which meets your goal of getting stronger without adding a lot of weight.
Diet is going to control this more than the compounds you choose (I actually like to start prep with testosterone cypionate and Deca, which is not what folks on the forums are going to advise, and pull the Deca out after about two months).
So what I am saying is you may meet your own goals better by focusing on diet rather than compounds.
Just something to think about.