Your cartridge has a (semi) line-contact stylus. Generally, these require just a fraction of the AS used for elliptcal styli. I don't know how the the TriPlanar is calibrated for AS, but most tonearms still match the AS to the VTF, an old holdover from the pre line-contact days.
If the VTF of your cartridge is around 2 grams, one gram or less of AS should be plenty.
If the VTF of your cartridge is around 2 grams, one gram or less of AS should be plenty.