In general, a good first approximation for tip strategy should be that higher ranking nodes tend to collapse or remove tips, and lower ranking nodes tend to expand tips. This is reflective also of the bundle depth/ranking strategy tying to reputation.
During tip selection, lower reputation nodes should more frequently form new tips (expanding the graph width), higher ranking nodes should more frequently re-use tips (shrink the graph width.)
In general, a good first approximation for tip strategy should be that higher ranking nodes tend to collapse or remove tips, and lower ranking nodes tend to expand tips. This is reflective also of the bundle depth/ranking strategy tying to reputation.
During tip selection, lower reputation nodes should more frequently form new tips (expanding the graph width), higher ranking nodes should more frequently re-use tips (shrink the graph width.)