Honestly in a 5v5 where a single death can sway a game so much there shouldn't be ANY instant death mechanics. LB or not. Make Sam LB do more damage and targets hit take 25% more damage or something. make Nin do massive damage to targets under 50% and if anyone hit under 50% you can get another use. However in a mode where deaths take *so long* to come back from and server tic is a real thing and makes predictions much harder instant kills should not be present.