I own a Transfiguration Orpheus L, which is also a low impedance cartridge. It is not sensitive to loading and I run it with 360 ohm loading.
Transfiguration Phoenix S cartridge - impedance loading recommendation?
This cartridge has a low internal impedance of 1-2 Ohms, and the manufacturer recommends an impedance loading of >7 Ohms.
My phono stage (Accuphase AD 2900) has MC impedance settings of 10, 30, 100, and 300 Ohms.
I have tried it at 10, 30, and 100 Ohms and they all sound ok. I am running it at 10 Ohms for now.
What settings have you found to be best?