Is most of that work waiting for Jira to respond to your action so you can take the next action?
I don't know if it's possible to have an adequately fast installation of Jira (since I've never seen one in a decade of Jira use at various places), but I do notice that people who have to put a lot of things into Jira seem to mostly use text editors or word processors to actually plan, and then transfer it a piece at a time into Jira once the initial result is done. Yesterday I was in a planning session with two others, and we did that planning with headings, bullet points, and concurrent editing by all three of us in a Google doc.
