I just need to know what I skipped, following the guide I do not understand what is missing;

mods.immersiveengineering.Excavator

//Exavetor addRecipe
//mods.immersiveengineering.Excavator.addMineral(String name, int mineralWeight, double failChance, String[] ores, double[] chances, @optional int[] dimensionWhitelist, @optional boolean blacklist);
mods.immersiveengineering.Excavator.addMineral("Iron Ore", 25, 0.5,["btt:deep_iron_ore"], [0.02]);

We don't add immersiveengineering support, so I can't tell you where you went wrong.