At my TRT Clinic I believe I overheard the nurses say they give 100mg a week.

Therapy for? Deca masks injury and further injury can occur

I haven't gone under 150-200mg a week when I've run it low like that. My indicator is always my legs. Doing leg extensions or squatting my joints feel stronger with it vs without. I may try 100mg soon. It takes so long to work, Its difficult for me to judge longer esters. When I try again I'm gonna use npp and front load it. Maybe even try just 50mg to see if I notice anything. The less I have to use, the better.

I've actually heard people say all the way down to 50 mg/week. I can attest to 100/week being effective for making my joints feel better. Can't say how much anabolism one would get from that low of a dose though probably a bit.