Test is a fun drug. It can give you the best gains, but it can also give you the biggest side effects. Vets preach saying to use test as your first cycle, and to only use it at 250mgEW for 8-10 weeks. From that dose alone, you will see if you are prone to any side effects (ie. acne, hair loss, gyno, etc.)
Now, lets say you have no side effects. Depending on how hard you workout, how much you eat, how clean of a diet you have, how strict you are with eating and training, and of course, how much sleep you get - that will determine what your gains are. I've seen people gain as much as 35lbs on a test only cycle, and that was from HARD work involved. But on the flip side, I've also seen people get shitty 2lbs gains from the cycle because they didn't workout, ate fuck all, ate shitty, and didn't sleep.
Now, EQ isn't a PCT drug. It doesn't do anything in response to you keeping your gains. What I suggest you do is read up, research, and then hit the juice after years of working your body to its limits. PCT determines whether or not you keep your gains, another steroid doesn't.