I have said it before, but perhaps because I am also of the same generation as
@Sides, I'm not a big fan of test.
Yes, I know it is reputed to be the best way to gain size today, but I think that comes with caveats.
To run a high enough dose, you need to run an AI or SERM, introducing another drug into the equation, and making the "bioidentical" argument for test moot.
And yes, test was "dirty" in the 80s and 90s. It was $10 for 10cc or UpJohn or Steris Cypionate, gave you hair loss, bloat, acne, gyno, and irritability.
Why not use a little test and more Deca and grow without the need for ancillaries?
I have done it both ways, and frankly prefer the way I did things in the old days: 2-300mg T a week with a good anabolic at same or double.
When I was 19 and about 240lbs. I was on 2-400 mg of test and 400 or so Deca a week, or maybe 100-200mg EQ with some anadrol now and then.
This was all "pharma" stuff (boldenone was 50mg /cc Equibold) so no high concentration gear and I only pinned 1 - 2x a week; 3x when on Parabolan for prep.
Now, If I really wanted to add more tissue I would raise the doses, but test will probably never go higher than 5-600mg.
I find 750 is the max I am comfortable with, and grow better from Deca anyway.
If I wasn't 51, and I wanted to grow I would do 3-600Test, 9-1200Deca, 50mg A50, and 5iu of GH. The rest would be down to food and training.
Maybe more test, or more everything would make me bigger, but this is the cliff-face of diminishing returns for me at these doses.
You need a test base if always on (this was also not the practice in the "old days" remember), but personally I view test as a foundation on which to build with other drugs in my toolbox, engineered for anabolism.
Right now I'm on 150mg test with 50mg A50 and doing great.