Behavior of twisters regarding Critical Strikes

Hello guys, so I'm running an amazon twister build and noticed (as some content creators did too) some damage inconsistences, and I think it's mostly because of the Critical Hit Chance calculation, with the ascendency "Critical Strike".

Some facts about my build:

- Currently using Far Sighted passive, so it drasticaly lowers the penalty for further away monsters
- My Crit Chance is 15.96% + 90.44% - 103.74% (this is the crit chance from hit chance)
- Sometimes I 1 shot rares, other times barely scratches (I'm at 426 crit damage, so most of my damage comes from crits)

Given this facts, I have some questions that may lead to solve this mistery:

As the hit chance is calculated, using your accuracy against the enemy evasion, it incurs the distance penalty, but what is the reference point, your distance from the monster the moment you cast the skill or your distance the moment the skill hits the enemy ? Or I can even think it being calculated against the distance travelled by the projectile ?

On another hand, seems like sometimes the entire cast of multiple twister (from salvo and barrage) crits everything, and sometimes doesn't crit anything, so if its calculated for the skill, again what is the reference point for the distance ?

Lastly, I did some research and couldn't find any info about the max accuracy penalty for distante foes, neither if the critical chance is calculated once per skill cast and counts for every projectile (didn't play projectiles on 0.1)

I hope someone can bring a light to this, I'm looking for the Pin boots (forgot the name) so I can test if further, because I know the sheet lies to us, but I'd like to know how it works, I'm new to PoE world so excuse me if some of my doubt's are common knowledge.