If we exclude testosterone and deca, then there is only trenbolone left for this purpose. There really no other options with the injectables that will give you a lot of mass. However, I don't quite get why you don't want to use deca - its side effects are mild, and most of them can be prevented. Use an AI to prevent estrogen related issues, caber to reduce prolactin related issues, and proviron to prevent deca dick. And you will get quite a good bunch of mass with it.