emergency scenarios

In a classic cluster configuration 3 spp + 2 sps I need to know the workarounds based on the following scenarios:

1-unavailability AD or AAD (with starling connect)
2-DNS unavailability
3-firewall unavailability towards target systems
4-network devices unavailability towards the target systems
5-unavailability of the two SPS nodes
6-unavailability of all 3 SPP nodes

Is there a document explaining these scenarios?
what are the indications to follow as a workaround?

this is very important.

thank you very much!