The commonality in the thread is that your gear priorities for the teams that are the core of your roster are most efficiently farmed with crystals. May it be stun guns, stun cuffs, carbanti, or the black balls, buy them with 1200 saved up crystals because you can get that in 3-5 days.
It's a matter of priority. You are complaining because you want to use those crystals for other things but you are facing the reality that your gear needs require those crystals. That is your real priority and you don't like it. You will meet your priorities faster when you are honest with accepting your true needs and stop trying to have everything.