In husn al-taʿlil, ask: “What cause is being offered for this feature, and is it an artistically fitting invented cause?” Mubalagha heightens an attribute; istiʿarah transfers an expression based on resemblance.
A verse can include all three: treating a constellation as a servant has a metaphorical aspect; making its devotion extreme adds hyperbole; but making that imagined devotion the cause of the constellation's visible form is husn al-taʿlil.