Ramping up is the correct way or doing it. It will reduce sides and let you body adjust. Even On long esters I like to ramp up and use 5-6 days a week. For example if you're doing 250-300 test E, 500-600 EQ or primo, and 150 Tren hex. Divide them into 6 equal doses and take it M-S.
so Test E 250X1= 1cc week
Tren hex 76.5x2= 3cc
EQ/primo 2x300= 2 cc.
Total is 6cc. So mix and load into 6 slin pins.Remember the long esters start to build up, so build it up slowly. You get the idea. The same works for any other compound, even short esters. you just have to adjust the doses etc.. Taking 2-3cc shots every 2 days also has its own problems.
By week 10 ish, you will start building up oil in certain areas and soreness and lumps will form. This will be more pronounces as you get leaner, or if you're already lean.
If adding even more compounds then you can use more concentrated gear to keep injection volume down. Im actually switching from Bayer Primo to a more concentrated 200 mg per cc, to keep volume down. At one point i was taking 2.6 cc shots daily and the soreness was too much by week 10. Also, If you're on Primo stay on it, in the long run the results are solid. Id say 20 weeks. Keep Primo and lower test as base and add 150 Parabolin, maybe NPP. Mix and match and change the 3rd substance out every few weeks.