well if you are learning hear this.
testosterone over a certain number of milligrams per kg ends up causing more side effects than its worth, such as estrogen conversion, blood viscosity, high blood pressure. so IF you are having estrogen related issues here is your culprit. that's why i limit testosterone to 3mg per kg, and at a push i will push it up when dealing with clients running high doses of masteron, which can present with low estrogen symptoms.
so when estrogen is uncontrolled and you add in 19nors such as Deca and tren, you get the issue gyno due to the progesterone-like effects that 19nors give you. and again with high doses of testosterone, 19nors will push up water retention giving you BP issues.
then you have masteron, which in your case is a very robust dose.
if i was you having estrogen and gyno issues, i would do some maths.
a good ball park for general user is 10-12mg per kg, competitive athlete, 15-18mg per kg, ifbb pro can be 20-30mg per kg.
so i would probably go on the maximum 15mg per kg you are, so 90x15 is going to be...... you guessed it 1350mg per week.
so we know you are getting horrible estrogen sides at nearly 10mg per kg, so if you pull down to roughly 3mg per kg and do 300mg of test, TADA no estrogen issues.
which leaves you 1050mg per week to get from anabolics. 600mg of deca is giving you issues, so i would cut that down to 300mg per week. which leaves you with 750mg masteron, which is pretty close to zapping estrogen pretty mich down to 0. so if we went and upped the test to 400 to account for this, and subtracted the 100 from the 750mg left, you get 650mg masteron.
and no probably no need for anti estrogens.
and note this would be peak dosing, and for about 8 weeks at peak dosage, down but after a 8-week titrating up. (starting at say 6mg per kg, and increasing over 8 weeks till you get to 15mg per kg).
taking peak dosing from the start just creates massive systemic fatigue and inflammation, as it takes time for the drug to start presenting with signs of working, it works from the initial dosing, but takes time to build peak concentration.