Something I find really useful is Jira integration with IRC. When something goes wrong, an IRC channel will open up with the name of the Jira ticket -- then status bots and logging bots will join automatically. It really helps to organize everything, especially when multiple problems are happening concurrently. It's also great for building post-mortem timelines after things are resolved.

In addition, most teams also have their own channel, so you can generally join it and ask questions for a quick response.

I built Slack integrations like this for ongoing development, but your use case for troubleshooting sounds amazing. I would love it if you wrote a blog post about it.

I've heard someone comment to the effect of "if you see a netsplit when you're in a war zone, prepare for the worst"