Raising spectres in Expedition league

I don't know if anyone else has noticed or if I'm imagining things, but the runic monsters in Expedition seem to make excellent spectres. They have good ranged and AOE attacks and even seem to spawn their own minions sometimes. Although these minions don't benifit from anything your minions benefit from and don't follow you around.

You can tell (I think) if you have raised a runic spectre because the usually white Energy shield bar is yellow. Ideally you want one with a bow or a big sword, they seem to be the best so far.

I'm only in act 7 so I don't know how this scales into the end game but I hope it scales nicely.

I'd be interested to know what others think.

I had this same thought, really can't find any info on it though.

I was using a Zombie with a crossbow that summoned loads of other mobs. Then a Runic Knight(?) with a big curved staff that does loads of AoE with mine-looking skills. I'm only in A9 so idk how they scale late game either.