Yup thats your problem 4lb mono for pike(wrong)may as well send the clippers out with the lure.
I use 30lb Stren super braid with a 9lb diameter.
I don't like to use leaders I have hooked into plenty of gators like you target lure hooked deep and the braid rubbing against its teeth
but it managed to hang tough.If that was mono by by.
If you want to use mono then use a 6 to 8 inch steel leader and upgrade to trilene extra touch mono(10lb test) from Berkley.
Believe me Pike are not line shy they are the easiest fish to catch I am sure if you through out a thick nylon rope with lure the
gators will bite it
Now go get some gators and send us some pics will ya