In order to create sub-pulses, we recommend using the Checklist feature within the updates area of each pulse! Utilizing the checklist will give you the low level pulse detail that you are looking for when breaking down your tasks. The opportunities here are endless when you add all of your relevant information for the pulse, at the pulse level. Keep your communication and breakdown of your tasks centralized in one place.
Alternatively, you could also think of each group as a respective checklist as another option; using pulses beneath it to reflect lower task levels. This could be useful if you're using a board as a personal weekly task list which could help you stay organized so you don't miss a step!
If you have any questions about this or anything else, feel free to reach out to our customer success team at firstname.lastname@example.org :)