With Rock season closing for two weeks - Likely many will go after Spanish Macs. Last year I lost some rigs due to the mid leader swivel getting bitten.
Not sure if by small Blues or Macs - really does not matter when a $$$ Sampo ball bearing swivel and $$$ trolling spoon are gone.
To avoid these loses - I add about 6 to 8 inches of single strand fishing wire that is brown colored. I use # 8 - because I had a coil. # 5 would be better .
I still had some frayed spot of leader next to wire from hits but adding the wire stopped the bite offs. I did not notice any decline in bites. Likely did better since I was not trolling just a planer without a lure behind it.
Be sure to break off the tag ends on the haywire twists so there is not a burr to cut fingers.
I use 15 feet of 40 lb mono from planer to swivel. I like 10 feet of 20 lb to lure ( tie directly ). Mono or flouro if a tough bite.