Tren alone ( clearly I mean with test ) is hard to beat for either bulking or cutting. Tren is the most efficient steroid known.
If you tolerate it, you can’t do better than it. There is little to no need to stack it with anything other than testosterone as nothing can out perform it.
Any steroid you choose to stack with tren is mostly for its other qualities, such as anti estrogen, joint protection etc etc. My opinion anyway.