Tormented Demons Setup

Just killed my first 40 using Arclight and Dark Demonbane w blood thralls and mark of darkness.

It’s giving me anxiety the number of soul + fire runes I’m blowing through. I know fires are whatever but at 12 per cast that’s a lot of shopscape time to replace them.

At the same time these spells clearly speed up the kill times. My dps w mage is much faster than my dps w the arclight.

What are people’s thoughts. I could go cheaper method for my secondary attack style w range or stick w this. I also was thinking I could use superior demonbane instead of dark demonbane for a dps decrease but use half the soul runes per cast.

I haven’t done the math yet but I’m guessing it’s probably 20 or so casts per kill. ~500 gp per cast so costing 10k per kill in runes. —> so this task of 250 will cost 2.5M

Edit: I don’t have bowfa yet, it’d have to be rcb. 98 range, 94 mage

I think most are going to say stick w arceuus spells given RCB as my only option. So I guess biggest question is thoughts on the cheaper demonbane spell?