Strengths:
* Superhuman Strength: Could lift millions of tons, move planets, and break through virtually any material. He's a "Planet-Buster" for sure.
* Superhuman Speed: Could fly faster than light, travel through time, and even outrun the Flash. He's a "Speedster-Buster" too.
* Superhuman Durability: Immune to most forms of damage, including bullets, explosions, and even nuclear attacks. He's a "Nuclear-Buster" in that sense.
* Superhuman Heat Vision: Could melt steel, destroy planets, and even use it to create powerful energy beams. He's a "Planet-Buster" with this too.
* Superhuman Freeze Breath: Could freeze anything instantly, even large objects and entire areas. He's an "Ice-Buster".
* Superhuman X-Ray Vision: Could see through anything, even lead. He's a "Stealth-Buster".
* Superhuman Flight: Could fly at incredible speeds, allowing him to reach any point on Earth or beyond. He's a "Distance-Buster."
Weaknesses:
* Kryptonite: His primary vulnerability, rendering him powerless. He is NOT a "Kryptonite-Buster."
* Magic: Could be vulnerable to powerful magic, depending on the user's skill. He is NOT a "Magic-Buster" unless we're talking basic spells.
* Mental Attacks: Could be affected by powerful mental manipulation, although he was resistant to some degree. He is NOT a "Mind-Buster."
In Conclusion:
Pre-Crisis Superman was a near-omnipotent force. While he lacked true resistance to specific threats like kryptonite or high-level magic, his immense power made him capable of overcoming nearly any obstacle. It's more accurate to say he was a "Threat-Buster" than a "Buster" of any specific type. He was a powerful force of justice, capable of handling most situations with his vast abilities.