JY's is reasonable, their T600 is 300/300 Enan/Cyp
(I have some, trying to force myself to get through this HYB T600 first or else I'll never use it)
JY blend is one of only two sane ways to brew high-dose Test IMO.
1. Mixing 250-300 of Enan/Cyp/Isocaproate
2. Using Test Decanoate and making it 500mg/mL because it holds fine at that concentration
Honestly, I'd much rather be running T500 Test Decanoate, but I can't find any.
Best ester hands-down -- holds at huge concentrations without super-solvents and has a long half-life for stable blood concentrations.
(But not too long, like Undecanoate or, god help you, Buciclate)
In the gearbox, I've got
- HYB T600
- JY T600
- WWB Supertest 450, Test Cyp 250 (15% cheaper than E, why??)
The WWB S450 is:
Ace (32), Prop (73), Phenylprop (73), Cyp (125), Deca (147)
Which seems like the same blend in your Jano test, here's to hoping it's overdosed to almost 500.