This type = "assembling-machine" is limited by crafting speed. Therefore, the crafting speed multiplier will not help. And if you apply recipes multiplied by 10 as before, then this will be a cheat, that's why if you insert the productivity module, it will add 40% to each ingredient, it turns out that in the recipe * 10 it is 400%!) There is an alternative to the Deadlock Experimental Stacking mod, which allows re-melting stacks, here it will be possible to melt in packs and and honestly the number of ingredients will be 1. Furnaces mod + beacons of speed and productivity this and so much.
This is cheat mode, 1 blue transport belt ore and 9 transport belt iron plate
And this is a drawing of 14 furnaces for 1 blue transport tape of iron plates for comparison
It's up to rebalance
And this is after