Why would he try to block it if all of Sans other attacks are causing him fatal damage? That would quite literally be the stupidest decision of Krillin's entire life.
"These attacks are causing me extreme pain and pushing me on the brink... Oh well! I better just block it! I'm sure it'll go well despite every other attack going through my defenses!"
And to act like Krillin needs some crazy precog to see every possibility and do the most common sense thing that even a child can do with their Chi without training is honestly ridiculous.
If Sans is being hit with an onslaught of attacks that instantly reduce him to low health (AKA even a few attacks are completely ***** him up), he's GOING to use an area of effect energy wave to disperse the attack and create a gap between him and his opponent. Just because Krillin has never done this in canon (Since he has never BEEN in a scenario where he's being bombarded by attacks that can easily kill him) doesn't mean we can't assume he'd apply common sense to the scenario. You're suggesting Krillin is being pressured, and instead of trying to counter it, he would just continue to do what is literally getting him killed. At this point it seems you are all making the same points ad nauseum until any opposed to Sans just goes along with what you say.
Even against Fodder Krillin is willing to use AoE. Let alone an opponent who with a single attack can inflict damage that falls in the fatal range. To think he'd try something that clearly isn't already working just makes it seem as though you think Krillin is stupid.
