A #3DPrinting slicer config that I learned recently which also became one of my most used configs:
Print sequence: by object

This config allows the printer to finish one object from bottom to top and then move on to the next object.
Slicer will make sure objects are laid out with enough space in between, to avoid extruder collision. (implying the caveat that you can't put as many objects if the print sequence is by layer) (1/2)