Regarding your Victor UA-7082 you can just remember that an optimal Victor top of the line cartridges designed for use with this arm on stock lightweight headshell are as follows (for example):
1) X-1IIe (MM) own weight is 7.5g, with stock shell, wires and screws it’s about 20 g.
Dynamic Compliance 12cu @ 100Hz (*please note than a compliance @10Hz will be at least 20.5 cu)
2) MC-1 (LOMC) mass 8.7g, with stock shell, wires and screws it’s about 21.2 g.
Dynamic Compliance 8cu @ 100Hz (*please note than a compliance @10Hz will be at least 13.6 cu)
So i think you can use any cartridge on 12g headshell with dynamic compliance from 13cu to 22cu @10Hz according to Victor philosophy. There are low and mid compliance cartridges! For higher mass headshell/cartridge combo with lower compliance cart you need a subweight for the arm.
I don’t think you will find any headshell lighter than 9g for use with higher compliance cartridges.
Buy
Hi-Fi TEST LP to measure actual resonance with your own arm/cartridge if you’re so worry about it.
Many online calculators are incorrect, you’d better use a record to check tonearm/cartridge resonance, you will see when they are shaking.
P.S. And stop buying mediocre cartridges if you really want to hear the potential of those tonearms.