[Edratman]

I hate Lure of the Deep. I have found even when you dispel it the AI casts it within a turn or two. I don't know who you are playing, but many nations do not have acess to dispel and this may not be an option.

The spell does not work in provinces where you have white candles and does not take PD units. So the only thing you can do is to build temples everywhere, set up priests in adjacent non costal provinces to preach, keep recruited troops out of black candle coastal provinces you own and set up a PD of 11 or more in these provinces to minimize land invasions. There are also other dominion enhancing constructions available to assist.