setting planting angle

I have a few trees that will be getting repotted at a new, often quite different angle at the next opportunity. Until repot, does it make sense to keep the pot at the new inclination? I have seen that some professionals seem to do this, but it's not necessarily consistent. I've also seen some...

I was taught to work the root mass sequentially, starting at the point of greatest limitation, then moving on to each subsequent one, until the tree is able to be secured in the container. Most often, this means starting at the base to reduce the height of the root mass and to set the correct...