Sure I can give you an auth, but have you tried each GUI setting?
For the own crabs, it only fights other people's crabs when you have aggressive mode turned on, otherwise it will just look for empty crabs and it will go for them.
As for the same approach mechanic, I will make it more fluid in the next update, thanks for that.
In the mean time, choose a script from my signature (I would recommend range guild) until I add these updates.