Phonostages will show different reactions based on their design. there is no Standard. Phonostage A with 100Ω will sound different compared to Phonstage B with 100Ω (for example). Simply try what is possible with yours and what sounds best, that's it. My choice for Lyra 47kΩ, but not many Phonostages can do that, some sound good, some are thin and analytical. Depends on Design...
Just try.
Just try.