I have some good news, not sure if I can leak or not but may be getting a way to hook to Runelite, if that happens then we should see wiki rates
Atm with mithril the best setup is: Minimise camera movements, Zoom out fully, Keep coins in bank, Always keep camera north, Action-bank open (<< very important for efficiency!), coal bag, ice gloves, and you'll be close to max rates (with a bot client). With rune you will see much higher profits but it comes at a huge obstacle that every blast furnace bot is facing: GE limit for coal. You will hit the 13k limit very easily so it's best to invest into coal early (put in 100k buy offer when starting) and it'll buy automatically as time goes on.
Also be wary of prices, right now a lot of people are using this bot so the prices may end up going down a bit which means profits will be reduced slightly, but it definitely is still worth it