If you have a low DHT you will need to use transdermal testosterone.
You will have to use low density transdermal, so you use large skin area.
Usually Androgel works good.
For this reason stay away from anything more concentrated than about 2%.
There are DHT creams, investigate.
Usual maximum Arimidex dose is 1.5mg/week
It would help if you posted
procedure of what you are doing
blood tests on that procedure.
Otherwise it is lots of guessing.