Before you do, knock it out of the pot and have a look at how deep those surface roots are. you might find that they are a solid mass rather than just a high skirt you might be able to remove. If so then that may change your design decisions above the ground.
(Note, do not disturb roots too much @ this time, you are exploring to facilitate design decisions, not pruning
ie you may make it a clump style with several trunks coming from a spreading nebari.
something like this one of mine
2011-08-13_IMGP0324.resized.jpg
2016-10-15_IMGP6769.resized.jpg
once you find out the root mass is like, then if you are heading the clump route, then remove all the low spindly twigs, and one growing back into the centre.
remove the obvious and useless ones until you end up with your desired trunk numbers.
If you find a small skirt or roots, then you may want to remove them to reveal any trunk line if it is interesting.
In that case, then look at the trunk line going up thru to tree so that you have taper and movement.
you can then remove the obvious ones and leave the bones to build on.
check my big one thread here for some pics
viewtopic.php?f=132&t=9913
Ken
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