Seems like a no-brainer to me.
To insure your wager, you will need to bet 4X your parlay wager.
So, if your parlay wager was for $10, you would need to wager $40 to insure the wager. Obviously, if your parlay wager was for $100, you would need to make a $400 wager to fully insure. This lowers your payout to 38-1 instead of 42-1. No brainer.
You can also guarantee a return of 7.5-1 if you wager 35X your parlay bet. For example, a $10 parlay wager would require a $350 ml LAL wager for you to guarantee $75 return, no matter what happens. The same ratio holds for any amount of your parlay wager.
PS You stole my avitar.....give it back!