I'm thinking about taking 1mg/day Arimidex for this cycle. Is this too much or should I scale it back to .5 mg/day?

Weeks 1-4: Test Prop 75mg ED
Weeks 1-15: Test E 600mg EW
Weeks 1-14: Eq 500mg EW

Stats
180 lb, 5'11"
26 years old
2nd cycle
10-12% bf

I was also wondering if there's a specific time of day for taking this? (ex. morning on empty stomach, before bed, etc)