I know guys who went as high as 6000mg of combined AAS for extended periods of time, just oils.
The strongest guy i ever trained with took 4000mg of Test E for over 2 years when he was competing in strongman, with some orals mixed in during contests. Rotated between E, C and Sust. Said the other AAS gave him bad sides and thick blood.
He's still alive today with 3 kids and no health problems that i know of but hasn't been on gear in 10+ years.
I know another guy who melted his kidneys taking Test/Tren non-stop for over 14 years. Ended up having one kidney removed. Still on HRT and looks pretty damn big today at 48 years old.
Taking 10g's a week does not seem out of the realm of possibility.
These guys are mentally ill and will do anything.