In my opinion Ladder logic is easiest to troubleshoot, as cause and effect can be easily followed, especially when being connected online and seeing the signaling. Unless events are too quick. Then no language has the advantage. Then data trace is helpful.

Structured Text is superior when it comes to calculations, bit manipulation and code flow (loops, conditionals etc). Sequences diagrams are advantageous for abstracting sequences. Function Block Diagrams are good for connecting abstractions. They all have their place imo, except Instruction List, which I can’t think of having a single advantage.