I am indeed playing with other mods enabled, but I have no idea what could cause it if it were the case. I haven't had time to try each mod. Next time, I'll first try an older version of your mod to see if it sill happens.
Perhaps it is relevant, but note that I had both the Ship & Weapons pack (latest version) and Knights of Ludd (also latest version) active.
And yes, the game crashes either when I move the cursor upon the Pather fleet or as soon as my fleet touches it (I suppose the crash is related to a specific ship in the Pather fleet).