At option 1 I'd expect the additional 200 mg/week of Primobolan would add a worthwhile (not cost-efficiently, but if not caring about cost) amount of extra results.
In the option 2 case, with 400 mg/week TE and 400 mg/week trenbolone enanthate (works out to 57 mg/day average) still there is some added kick to be had but the additional 400 mg/week Primo would be a bit subtle perhaps.
Simply injecting a modestly greater volume of the less expensive 2-component mixture would be much more cost-effective.
But if that's not on the table for whatever reason, then sure.
My option 3 would be:
Don't worry about injection volume. Injecting with an insulin needle is no big deal. I've injected as much as six oil-based injections per day That is more than I prefer but the point is, it's not necessary to go so extremely low with it.
And not worrying about injection volume, now I would make the tren-E at say 100 mg/mL. (TA I prefer less concentrated, and I have not made tren-E, but it would be more readily soluble. And leave it alone.
And make the test-e. Why not make it at 200 mg/mL.
And make the methenolone-e, at 100 mg/mL, and save it for later.
I would now be free to adjust trenbolone and testosterone as desired, independently. And if I decided the "trenbolone" was counterfeit or something actually undesirable, I wouldn't have wasted my testosterone or methenolone.
If I'd never used trenbolone I'd start at 50 mg/day or whatever would have the same amount of trenbolone as 50 mg/day of the acetate does (I don't have at hand the figures to do the calculation but it would be something like 60 mg, 65, probably less than 70, dunno.)
And if I liked that I'd consider moving it up to the equivalent of 75-100 mg/day of the acetate.
(Just take the molecular weight of the enanthate and divide it by the molecular weight of the acetate and that would be the factor to multiply by, to figure equivalent amounts of trenbolone.)
The testosterone, I'd use at a rate such as totalling say 700 mg/week.
Every other day injections would be good.
The Primo I'd save for later and I would be glad I did.
If somewhere along the way you decide you are very happy with a given amount of each of these things and want to create a vial of the well-liked mixture, it will be easy enough to take say (just making up figures) 4 mL of one solution and 6 of another, or whatever, and add them to a vial.
The injection volume will be greater than necessary but still nothing unreasonable. Then next time around you might try saving on injection volume via doing it all at the same time.