The intorable limiting factor is more-likely belongs to Bluepoint cartridge.
Replace with new Shure V15vXMR. Than think of phonostage.
Don't go bellow ARC PH3($800 used) otherwise you'll spend much more for upgrades. This phonostage could be used for cartridges down to 1mV output with passive preamp and down to .6mV output for active preamps. You should be able to vary the load by replacing load resistors since that's the only way done in this phonostage.
Replace with new Shure V15vXMR. Than think of phonostage.
Don't go bellow ARC PH3($800 used) otherwise you'll spend much more for upgrades. This phonostage could be used for cartridges down to 1mV output with passive preamp and down to .6mV output for active preamps. You should be able to vary the load by replacing load resistors since that's the only way done in this phonostage.