Personally, I wouldn't call it Spider Rigging going that fast. That's almost my Pushing speed.

How deep of water are you Longlining in ?? If you're dragging bottom at those speeds, don't let out as much line (unless near the bottom is your target depth).

I'm not sure if a 1/4oz jig on bottom & 1/32oz jig on top (in a double jig rig) would separate at those speeds.

To be clear, though .... I don't Longline troll. I'm just comparing methods vs speed.