As you are aware, upgrading a larger environment of EV-servers can be a little confusing.
I've done upgrades from 6 to 7, from 7 to 7.5 and now from 7.5 to 8.0
My environment is pretty large.
9 Journal Archiving servers
15 Mailbox Archving servers
4 Discovery Accelerator servers.
The attached sheet will only show updating EV, not DA.
The sheet consists of 2 pages.
Page 1 is the Pre-Upgrade steps.
Page 2 is the actual upgrade steps.
In the sheet, you will see a red line with the word Sync at the end at several steps.
This indicates that if you perform an upgrade with multiple people (each one doing a server (or 8 ;-)) that is the point where everyone has to wait for the others to reach that point before continuing.
I made the sheet having 3 servers.
1 EV-server being the first installed server, called Directory Server.
2 EV-servers, one being a Journal Archiving server, one being a Mailbox Archiving server. There is no real difference between those, but it is to indicate a multiple-server environment.
I compiled the sheet using experience, the update/upgrade documents, and 'lessons learned'.
Do comment if you feel steps are missing or in the wrong order!