"Light-Imprisoning Mirror" is a good combo with this card - it negates the self-destruct effect, but not the Piercing, as that is a continuous effect.
Tribute one monster to summon this card while "Athena" is on the field. Then tribute this card by "Athena's" effect to special summon this card. Your opponent takes 1200 damage and your "Majestic Mech - Goyru" will not be destroyed during your end phase.
Tribute "Zolga" to summon this card to benefit from both cards' effects.
If there aren't any monsters in Defense Position, use "Block Attack" and then "Micro Ray" to change a monster to Defense Position and then lower its DEF to 0 respectively. Using "Majestic Mech - Goryu's" Piercing ability, you can attack with a full 2900 ATK points for devastating damage.
Activate "Altar for Tribute" or "Mystic Wok" to tribute "Majestic Mech - Goryu" and gain 2900 Life Points before it is sent to the Graveyard via its own effect; then, if "Call of the Haunted" is set, "Majestic Mech - Goryu" can be instantly revived with another attack and its condition reset.