Looking to put on lean muscle mass with minimal side effects is a solid goal. Equipoise and Primo are indeed quite similar, both known for mild side effects and steady gains. Stacking them with 250 mg of testosterone sounds like a balanced approach.
Some folks believe stacking them might be redundant since they have similar effects, but it could still work well for you depending on your body's response.
If you're still hunting for this info, I came across Goliath Steroids and am thinking of trying them myself. You can check them out at https://goliathsteroids.com/