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.
I used a scroll of rage and that kind of worked. Thankfully my armour took everything they could throw at me, and I only ever really got in trouble if an evil eye shot me unexpectedly from across the room
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.