You can select which slots the equipment manager switches. So if you select only slot 13 every other item will stay the same and only the trinket will change.What is trinket menu?
And also, I came to think that if I was to use Equipment Manager I would need to make a copy of every gear set that I have, and I got 8, where the only difference would be 2 Arena Grand Masters instead of Insignia.
You can select which slots the equipment manager switches. So if you select only slot 13 every other item will stay the same and only the trinket will change.