Blending propionate with a longer ester such as cypionate or enanthate is a good choice if you're going to inject daily. Propionate alone causes an unnaturally large variation in serum testosterone, while a longer ester usually leads to an unnaturally low variation. There's a long thread
here discussing how to make such a blend. Of course a blend isn't strictly necessary, it's just more convenient. Particularly when starting out you can draw both esters separately into the same syringe. When better information is lacking, a reasonable starting point is to get half of the testosterone from each ester. Bear in mind that propionate is 83.7% testosterone by weight, and cypionate is 70% testosterone.
On the subject of dosing, a blend allows you to use lower dosing. Even so, your current dose is excessive, almost double the natural production rate for healthy young men. A better starting dose for cypionate is 40 mg twice a week. In any case, for a starting dose of a blend, aim to inject 7-8 mg of testosterone daily.
Suppose the propionate concentration is 100 mg/mL and the cypionate is 200 mg/mL. Call Vp the desired propionate volume and Vc the desired cypionate volume. Then we need to solve these two equations to find the dose volumes:
Desired_T_dose = 83.7% * 100 mg/mL * Vp + 70% * 200 mg/mL * Vc
83.7% * 100 mg/mL * Vp = 70% * 200 mg/mL * Vc
These yield:
Desired_T_dose = 2 * 83.7% * 100 mg/mL * Vp
Vp = Desired_T_dose / ( 167.4 mg/mL )
Vc = Desired_T_dose / ( 280 mg/mL )
For a Desired_T_dose of 7 mg, the propionate injection volume is 0.0418 mL and the cypionate volume is 0.0250 mL. If you use 0.3 mL U-100 insulin syringes with half-unit markings then the dose includes 4 units of propionate and 2.5 units of cypionate. The next easy increase is to 5 units of propionate and 3 units of cypionate, yielding a bit over 8 mg of testosterone.
