First every cycle Test E 500m or Sustanon 250? 500m

[wufo]

Alright one more time
Stats:
23 years old
5.6 166 9% Been trainning naturally for 4 years i know how to diet count calories( get shredded ) bulk and the basics before jumoing into the real deal i competed last year Mens physique at 155

1-12 wks Test Enanthate 500mg only
Should i up a little the dose or stay the same start lower and also which Ai (Estrogen blocker) would i need at which dose im loooking at arimidex thank you for Your time

[Gaspaco]

Look at the stickies