Had tropical punch on my friends payload 8wtand it loaded and casted well for me. That taper really helped load the rod quick for short/medium distance shots.Airflo tropical punch casted nice on the payload for me. The Cortland redfish taper was another one I liked on that rod.
If Im not mistaken its already a heavier line for an 8wt line. I personally would just stick to the 8wt line. Some times when you go up another line class it starts casted real sloppy. Not an expert just from my own experience. Like mentioned above SA grand slam is also a great line.Could I also go one size up 9wt line what do you think