Your question is one that can't be answered definitively. There are so many variables that go into ones cycle, how many calories consumed, how much work involved, level of experience, etc.
As far as 250 the first 2 weeks then 500 the rest, I think you would be shorting yourself. It takes me 200mg to even get 400 to 500 on TRT, 250 would be just better than what you are at and would just knock your natural production out shortly. So you may get an initial peak but your own test numbers would take a hit and your numbers would decrease.
I would just start with the 500 a week and keep it there the duration of your cycle.
Your proposed cycle would only utilize 4500 mg of sust leaving 500 mg or 2 shots in your vial. Just do 500 a week for 10 weeks and you won't waste any gear.