Swapping prompts for batches

[A2Sumie]

Is your feature request related to a problem? Please describe. Alternative prompt swaps prompts for every step. Wanting a prompt swap for every batch.

Describe the solution you'd like Introducing <>s for instance, a prompt within would be chosen and sticked to, and swapped during the next batch.

Describe alternatives you've considered Alternative prompt, not desired.

Additional context #2944 Hoping that I don't need spaces for blank(dummy) prompts if implemented.