Selected colour to dotted/dashed line

[Krikor]

Converting to grayscale really makes the chart difficult to read.

Initially I thought of sorting by color and then applying strokes to each line (I think that's what you did).
In the copy I worked on, however, even when I tried to adjust the Threshold value, the selection had several interruptions in its continuity.

Creating paths seems to be a cleaner and easier option since it's just straight lines.

However, overlapping dotted lines does not give a good reading.
   

One option (maybe) is to just draw the lines with different thicknesses, and in just one of the 5 make a stroke (so as not to create a very thick line).
   

If there weren't so many overlaps between the graph lines, different dotted lines or even brushes created to customize the lines would be a good solution.

But definitely nothing like reading it on a colorful chart.