you're right, i'm misremembering
totems were made to scale better into the late game, that was why they changed them iirc. other summons still only scale with summoning then
you can have two rangers, but aside from the redundancy, having two rangers means you have two people who need to stand on elevation doing physical damage. if i'm splitting damage between physical and magic, i don't want both my physical damage dealers in similar positions, and it's also better if at least one of them can take hits