I've never done over 1 in the delts, so I'm not much help, but the quads no problem. Maybe consider the pecs. I know many don't like injecting there, but i love it, and the volume shouldn't be an issue.... Or at least isn't an issue for me. I rotate quads/chest/delts/right glute..... (Because I'm just too uncoordinated to do left glute
This is NOT a real appealing idea to me, but another thought is to break up the injections into two, mast/test in one, tren in another... Or whichever you want. Yeah, it's two injections but if you still want to keep low volume in your delts, its an option.
Good luck with things,
C-
Stop over-thinking, simplicity facilitate many things.