What are the pros and cons of using aromasin "during" a testosterone cycle ??

If there are advantages, what are they?

Also, would you adjust the dosage of aromasin to the dosage of testosterone?

I am planning on running a 400-500 per week dosage of Sustanon.

For those that do not know my stats, I am 53 years old

wt. - 177
ht. - 6 ft

have a little fat around the waistline, but really lean other than that.

Have been working out since the early nineties. Backed off a few times during that span, but always kept up some kind of fitness throughout all those years.