I don't have a Phantom, though a friend has that arm and we set antiskating by ear. To do this, we used a Shure test record that has instruments being played at progressively higher levels. At some level, the cartridge will begin to mistrack. The mistracking will be heard first in one channel or more predominantly in one channel. The mistracking means that the corresponding groove wall is losing contact with the stylus. If it is the right channel that is mistracking the most, it means that the outer groove is losing contact and you have to INCREASE antiskating force. If the left is losing contact you have too much antiskating being applied.
To set azimuth, I first examine the stylus under magnification to determine that if the cartridge's geometry is, to begin with, perfect. If it is not perfect, I return the cartridge (given the price of these things, that is not unreasonable). If the stylus is perfectly vertical, then using a reflective surface to determine visually that the cartridge itself is perfectly vertical works. I have used the VOM approach with a multimeter to confirm the results. But, I would prefer physically vertical alignment (visual) to proper electrical alignment of the signal generating elements (determined by use of the VOM) because of concern with wear of the stylus and damage to the record if physical alignment is off. To do the VOM approach, you need to measure the voltage delivered to an amplifier output (i.e., to a speaker or a dummy load), not a preamp, to get a big enough signal to make a meaningful measurement. I used the Wally analogue shop for this purpose myself, but I had to borrow an amp because my 6 w/ch amp did not produce a strong enough signal for the measurement. Even done with the Wally gear, it is hard to get consistent results (even better would be to filter the output to remove noise from the measurement). I would stick with the visual approach.
To set azimuth, I first examine the stylus under magnification to determine that if the cartridge's geometry is, to begin with, perfect. If it is not perfect, I return the cartridge (given the price of these things, that is not unreasonable). If the stylus is perfectly vertical, then using a reflective surface to determine visually that the cartridge itself is perfectly vertical works. I have used the VOM approach with a multimeter to confirm the results. But, I would prefer physically vertical alignment (visual) to proper electrical alignment of the signal generating elements (determined by use of the VOM) because of concern with wear of the stylus and damage to the record if physical alignment is off. To do the VOM approach, you need to measure the voltage delivered to an amplifier output (i.e., to a speaker or a dummy load), not a preamp, to get a big enough signal to make a meaningful measurement. I used the Wally analogue shop for this purpose myself, but I had to borrow an amp because my 6 w/ch amp did not produce a strong enough signal for the measurement. Even done with the Wally gear, it is hard to get consistent results (even better would be to filter the output to remove noise from the measurement). I would stick with the visual approach.