my 2 cents,
I took Minocycline for literally years in my puberty, had lots of acne. Nowadays when I have an infection, like pharyngitis or tonsilitis, I have problems with antibiotics, the 1st line antibiotics ussually dont work on me and docs have to give me the stronger stuff. Its a pain, and I regret it. Maybe I am wrong, but at least partially, I atribute this to the minocycline abuse (doctor prescribed).
Furthermore minocycline never actually erradicated the acne, it improved maybe a bit, long time ago...
Now if you are using for a short period, and if really works for you, I advise you to use it... Believe me, I know how having acne feels
About the cycle: why are you using 2 AI's ?? I'm sure some others more experienced members can explain better, but you dont ussually need both arimidex and aromasin while on cycle for Estradiol control. Just use either one or the other..