Any reason to not have the ability for the bot to shift + click the coal bag with the bank window open for "Fill"? Theres definitely some unnecessary time spend in withdrawing coal, closing bank window, filling the bag and then opening the bank window again when it could be done with one click within the bank.
That's the whole point of hybrid. You only have space for 26 coal
The method is relatively simple to execute. An inventory consists of a
coal bag;
goldsmith gauntlets and
ice gloves (one pair equipped); 26 gold ore; and 26 mithril, adamantite, or runite ore. Each time a full inventory of gold ore (26) is added to the Blast Furnace, the player will also transport and deposit 26 coal with the coal bag. Every few trips, depending on the ore that is being smelted, the player will forgo an inventory of gold ore to deposit an inventory of the mithril+ ore of their choosing. This will occur every two, three, or four trips depending on if the ore is mithril, adamantite, and runite respectively.
Because every load of gold ore also adds 26 coal to the furnace due to the coal bag, it results in this "hybrid method."