I gotta chime in. How the hell did you get such a high dose of test AND deca for trt?? It's usually 250 test every other week. Good for you.
Having done EXACTLY what you are doing, let me share my experience. I was tempted to do it "all at once" but refrained. Just the test alone at even 250/week is gonna bulk you up 20 pounds and make a HUGE difference. It did me.
Now - this is what I found out - the 2nd cycle of test DOES NOT do as much as the first. This is when I added equipoise and it helped a lot. I would save the deca till after ten weeks or so when the test has done it's thing.
ythrashin is right about cycling to lower levels. people still cycle during testosterone replacement therapy (TRT) - as I am doing. Just go down to 200-250/week off cycle (time off=time on). And as ythrashin said, no need for pct if you stay on testosterone replacement therapy (TRT) dose - although, I do it anyway (Clomid)
And I agree with his test e only for the first 12 weeks - your gonna waste the deca doing it on your first cycle plus you can get more side effects with less return on investment. If you "ease" into it - you get less sides - it did for me. I didn't get sides till I stopped.
Dude - if you ain't blowing up in 4 weeks from test alone, I'll eat my words. Actually, I can hardly wait for your post about week-4 after test. It's way cool feeling - and prepare the wife dude, its like your 18 again in bed.
Rep points to ythrashin for the input.