Degradables cut into profit. To be fair, its been a while since I did Glacors, but at the time the best money/hour setup was dual seismics subjugation (no degradables except weapon) In those days we got at least 145 kills per hour with this setup with a legendary pet, with a possibility of up to 165 kph if a real familiar was used. It has been nerfed since then, I think the maximum these days is like 130 kph or so because they increased the hp of glacors by a bit but the setup likely remains the same. Only use your prayer potions when your prayer falls below ~60 points, sapping glacyte and sapping-mode glacor used to drain based on your current prayer (I'm not sure if this is true anymore...). You have 100% accuracy so supreme magics are better than overloads at glacors.