Which Out First Amalgams or those next to gold crown

Just about to start Amalgam removals and notice I have a large Amalgam touching a gold crown [1 only]

This is not showing the highest voltage, three lower Amalgams are, but Cutler advises removal of those dissimilar metals first.

Anyone any advice on this please, or maybe have the 3 lower [high voltage] done then the upper one next to the gold crown at the same time?
Or just stay with the process of removing the highest -tve voltage then lower one until we reach the upper one?

Thanks