Several variables in play here: line size, senko size, length of casts, etc, etc. I have tried most of the G Loomis rods and would suggest that in a 66″ rod, go with a 4 action, in a 7 rod, either 3 or 4 will work well. If I had to pick one, the G Loomis 75″ GLX Senko rod (#3 action) is about as good as it gets for fishing the 5″ Senko. The 72″ GLX Senko rod (#4 action) gets the nod for the 6″ version. These rods are pretty pricy, and if that is an issue, Im sure there are other good alternatives on the market. I have tried most at one time or another and have concluded that for me, G Loomis is simply the best.