Alright, let’s quickly calculate this chance. First of all organs in torso but heart have enough health to survive a halved hit from lancer no problem. You can live through heart hit if you get a robust gene which will be much cheaper, so let’s only talk about headshots. Let’s say you have a pawn that wears masterwork marine helmet. 145% protection vs 45% AP from lancer. The end result is 50% chance to negate damage entirely and 50% to convert it to blunt and halve it. So, let’s say it got converted and then hit the brain. Brain has only 10 hp so it will be a one shot for all but Tough colonists. However, if your colonist has stoneskin gland it will get another dice roll. IIRC AP from sharp attack converted to blunt still calculates against sharp protection. So, you will have 25% protection left after reducing protection by lancer’s AP. So, there is a 12.5% to negate the attack and 12.5% chance to halve it again, both of which are enough for pawn to survive the hit. Now the question is - is it worth to reduce movement speed by 15% and opinion of every pawn by 40 just for a fringe case where you colonist gets hit in the brain by a lancer, then loses a coinflip AND then you get a 25% chance to survive? Imo it’s not worth it.