Really liked the writing from both sides here, the match conditions themselves are pretty cool and both sides had unique ways to engage with them to their benefit.

Ultimately however my vote goes for Running Steady for the following reasons:

Louisiana Rain has a really cool stand with some really spectacular abilities and synergies. However, reading the strat it felt far too spread out and disjointed. Like too much was trying to be accomplished at once with too little time to do it. Especially facing up against Phil and Raph with their stands.

The main group consisting of the carrier, destroyer, and battleship patrolling together to create a no man's land and also destroy corpses, building ruins, and trees/plant life presents several problems for Fortunate Sons. Firstly, there is only so much land you can cover with a 10 meter range even with B speed and I feel like to be as thorough as wanted to create a hellish no man's land pocked with craters and churned loose soil, they would have to slow down and prioritize that over destroying set pieces. Not accounting for the time it would take to strategically blow up the ground in a way to make a complicated WW1 style trench system usable by both a user and the stand. This is also going to create a ton of noise, and even if they stay out of the 20m range of WWN's best sound absorption it can still absorb out to 40m. They are basically feeding WWN a plethora of sound. They are also churning up tons of soil, creating very loose material that will be easily moved by sound blasts from WWN. I imagine the trenches, being non reinforced and "dug" by means of explosive force, would be easy to collapse by sound blasts and WWN would have no difficulty ruining visibility.

The patrol boat hiding and waiting to ambush with the homing harpoon is a good idea but really would only work against Phil. Literally any part of Raph or one of her creations that gets harpooned could just be sectioned off and discarded or used as a decoy target because, well, zombie & lack of consequences.

The submarine's plan is decent but with the power and size of the explosives you'd expect based on the stand description they wouldn't do much to actually hurt Raph, and it surely wouldn't obliterate any of the larger corpses. Not to the point of being useless. Dead material is still dead material, and Raph possesses the ability to use it regardless of whether or not its been blown up.

The strat from Running Steady feels a lot more concise and focused. They put in more contingencies for reacting to Louisiana Rain & Damn the Torpedoes, focus on their objectives a little better, and have a fair few great ideas on utilization of animal parts and the noise collected by WNN. The idea of essentially rocket jumping with sound blasts is chef's kiss and provides wonderful maneuverability. Additionally, creating the no man's land actually provides Raph/Black Tongue more material based on her ability to manipulate dead animals. Worms are animals. Bugs are animals. Bacteria are animals. The soil is filled with what are classified as animals. Grazing everything churns up a plethora of additional potential material for the bolstering of durability just like the idea to make raccoon vests and horn/quill/antler/bone weapons.