Dear Taylor: That Ortofon DC resistance is 4 Ohms so loading it at 100 Ohms is a good to start value but like almost everything on audio and specially on phono cartridges the quality performance is system dependent, good cartridge set-up and user ( you ) music sound reproduction priorities, so don't be " shy " about and try from 75 Ohms to maybe 250 Ohms and then choose what even your priorities.
Regards and enjoy the music.
Raul.
Regards and enjoy the music.
Raul.