The raid reset thing worked for me. Convert to raid, promote account #2 to leader, log out account #1, log in account #1's level 1 alt, promote account #1's alt to raid leader, log out accounts #2-#5, account #1's alt reset all instances.
Then switch account #1 back to your main and log in accounts #2 through #5. You can then kick the low level alt and convert back to group if need be (for quest objectives).
Following this simple 96-step process, anyone can reset an instance without timing out the hourly instance limit.

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