He did not use it aganst Lucci. It's normal that Luffy did not use his best ability against non antagonist. Even Luffy did not use internal destruction against Ulti and Page One.
Again Aramaki would have comented on it if he cannot drain King. He did not. Oda just off panelled it.
There is no burnt plant in the panels of Aramaki beating King and Queen. King cNnot burn Aramaki plant.
Again Ace melting Kuzan ice shows being top tier shows your df is not immune. Why cannot King burnt Aramaki plant when Ace a high tier melted Kuzan's ice? Aramaki flame is not potent enough. Thus he cannot burb mochi.
They panel is right there, king was not drained at all.
And why would he comment on it if he had already restrained and captured him.
Read the story, aramaki has fire proof forest ability.
Also ace melting aokiji's ice did jack shit, just because u can counter it doesn't mean anything. Ice not being immune to fire is a given, the point is did the fire do any damage which it did not.
Stop comparing Aramaki and Katakuri. Its disrespectful to Aramaki as an admiral to be compared to that bozo