Technically it's all opinion but from what you said something that will not kill your lungs is a vape. While a bong hit might be extremely smooth coming in if you rip too much smoke for you to handle once you blow all that smoke out you're going to be dying.
a fat, properly rolled joint. the smoke tastes so fresh. not the most efficient method compared to a bong. the only thing i would suggest not to smoke out of is anything with a tin foil bowl.