My main concern would be that you will get REALLY strong from this cycle. If you are recovering from a back surgery, it would be easy to get hurt all over again. You could use less aggressive compounds and still do really well and you may even be able to enhance recovery. What do you think about GH? This is a great compound for repair and will help with fat loss too. Anavar improves collagen production and also may help with recovery as well as being a mild fat burner. You could use your Sust for a 12 wk plan, include Var at around 40-60mg ED for 8 wks. Run GH at 2-4iu from the start of the cycle and continue on long term. If the Var is too pricy you could use EQ at 400mg EW, which also has collagen building properties. Then to focus on more fat loss, you could cycle clen into the plan. Really you could do the cycle you proposed but Im throwing this one out there since it would actually have some properties to help enhance recovery