Run labs to see if it is necessary. At 120mg a week, it may not be and if you add one in, it will just be another thing you have to keep track of. That is right around my normal TRT dose and I only take zinc and DIM (not for any AI effect, just conversion of estrogens) and mine average in the high 20s-mid 30s where I feel good. I do keep exemestane (Aromasin) around for anytime I know I will be having drinks as that will quickly raise my e2 levels and I am a ****ing bear to be around the next couple days. That quickly takes care of it.
As mentioned, everyone deals with aromatization differently, so you need to understand what is happening before just adding in stuff.