I believe your question was about injection not critiquing your cycle. It's totally your preference. I would do a solid rotation of the 6 common pin sites, glutes, delts, quads. As for combining the two would also be preference or tolerance, I would find injecting 2 ml of anything into one muscle uncomfortable. So for me I would spread it out a bit, but try it and see how you feel. You can always adjust this during cycle.