rand = Math.random;
    }
    // ... Fisher-Yates shuffle implementation
}
```

The main approaches are:

1. `deterministicMathRandom`: Uses SHA-256 hashing to generate a deterministic random number from a string seed and salt
2. `seedrandom`: Used in test environments to ensure deterministic randomness
3. `shuffle` with seed: Uses a simple mathematical formula based on sine to generate deterministic random numbers

For test environments, the codebase uses a fixed seed ('fixed-seed') with seedrandom to ensure tests are deterministic. For production code, you can use either `deterministicMathRandom` if you need string-based seeds, or the `shuffle` function's seeding mechanism if you need number-based seeds.

The most robust approach would be to use `deterministicMathRandom` as it uses cryptographic hashing to generate the random values, making it more uniformly distributed than the sine-based approach used in `shuffle`.