Another inquiry: Whether FORTUNA MAJOR can combust or subradiate the figure of FORTUNA MINOR, even though FORTUNA MINOR is also ruled by the SUN?

The answer is YES. FORTUNA MAJOR is not really destroying the figure in the house under consideration, but is destroying the ability of the MUNDANE HOUSE (i.e., the EARTH HOUSE) to produce anything. Nothing will grow in scorched earth no matter what seed is planted there.

Remember the story of Phaethon, the son of the Sun god Helios. Phaethon once begged his father to drive the Chariot of the Sun. Helios, against his better judgment, permitted it, as Helios had promised Phaethon he would grant Phaethon anything he wanted to prove that Phaethon was his son. Phaethon lost control of the Horses of the Sun, which dove toward Earth, permitting the Sun to scorch Africa and create deserts there. It was MOTHER EARTH, in danger of burning up, who pleaded with Zeus, the King of the Gods, to save her. In order to preserve the Earth, Zeus struck the chariot with a thunderbolt and destroyed it, and killed Phaethon. This will help you remember that it is the MUNDANE HOUSE that is COMBUSTED by the strong SUN figure, FORTUNA MAJOR.