There were 2-3 more off screen for, plus 2-3 evil eyes. Swarm challenge goes brrr.
I had level 7 plate armour with a stone enchantment, a level 8 vampiric great shield, and a runic blade.
While I could smash them if I caught them, I didn’t have much to charge up runic blade on so the process was slow. Couldn’t bait them to the doors because the room beyond was huge and they would run off.
One strategy of mine lately has been to stockpile potions of mind vision and scrolls of psionic blast for the lower demon halls depths for times when the scorpions and evil eyes are being oppressive.
I try to save a couple for the ascent too.