No matter how you look at it, gaining 30 lbs is going to slow you down, especially, if you are trying to gain it all at once. Going from 175 to 205 is going to be a huge jump and honestly, if you can gain that in one cycle, it isn't going to be all muscle. I would expect to gain around 10 keepable pounds on a first cycle. Maybe 15 lbs, if you are lucky, but the rest will be fat and fluid. I know that you want to have a tangible goal to focus on, but if you do everything right, eat the best you can, train the best you can, you're going to make the best gains you can. You can't tell your body, "Gain 8 lbs of muscle...Gain 10 lbs of muscle". Some guys gains muscle faster than others but no matter what eat or take, or how you train, your body will grow at it's own speed. Building muscle is a life long journey. Focus on the long game. As they say, anything worth having takes hard work. In bodybuilding, that means doing everything right for a long time. Years.

So lets talk gear. If you want to make big gains, you will sacrifice conditioning for the short term. If you stick with something like anavar, it will help get you stronger, and you'll gain several lbs of keepable muscle, assuming your diet and training support your gains. On a cycle like this, you can still stay fast while growing and get a hell of a lot stronger. If you want to gain as much as you can though, running a proper test cycle would be the answer. It is going to bloat you and it may slow you down. Because of this, I would keep the dose lower to reduce estrogen related sides. I would take an AI along with it, to keep fluid lower. You will however, want to keep the dose lower on the AI, or it will effect your gains. After, you will want to do a full PCT, 2 wks following the last injection.

1-12

Test E 250-350mg EW, split into 2 shots

adex, starting at .5mg 2x wk, on injection day, up to EOD if needed to reduce fluid build up. 

PCT is Nolvadex 40mg ED for 1 wk, then 2 wks of 20mg Nolvadex ED