It is important to restart your testosterone production following a steroid cycle, and that's what PCT is for. PCT drugs do this effectively, whereas over the counter 'test boosters' do not.
Look man, I know you're going to do what you want, but 25 days is a long time to run oral tren, particularly with no testosterone base. I think you're gonna hate it when you're done. Your appetite is going to be killed, and you're going to have to deal with the toxicity for months after your cycle is over. I'm really interested to hear/see the results from this. I hope you follow up with us and let us know how it goes.
Oral tren does NOT aromatize, so an AI will be useless. Don't run the arimidex unless you run an aromatizing compound with the oral tren.
The dose you've suggested is reasonable. Don't raise the dose from this though. I would have suggested 250-500 mcg, so you're within standard range. I would cut it to 3 weeks for safety, but that's a risk/reward proposition you have to determine for yourself.
I don't believe you will make lasting gains. You should be able to assess the overall value of the cycle about 2 months after you complete it. At that point, you'll know how well you recovered, and have a pretty good idea of how sustainable your gains will be.
Best of luck, and again I hope you follow up with us at the end of your run.