You could use the concept map template to do something like this
Map is attached.
Thank you Sia, this will work indeed. I was wondering if there were more possible variations in the style and format of the arrows/relationships besides changing their thickness and color. I would like to give them some oomph or a fancier look. Are there embedded/preexisting rounded arrows for instance or do I need to shape them all up manually with the handles?
Yes, relationship lines can be formatted in those ways, but you can also use your own image in the background if you want something fancier. Example below and map attached.
Thank you, Sia, for this interesting workaround! :)