Maths problem: fatigue vs critical hits

[Micah]

I'm still amused over the painstaking research to figure out how something works when it doesn't actually follow the behavior described.

I just tested this with a troll king with a robe of invulnerability vs 12 and 13 damage chaff (25 body prot, somewhat more on the head since the chassis has a helmet). Under 15 fatigue he gets damaged twice over 8 rounds of combat in melee. As soon as he crests 15 fatigue he starts taking about 2 damaging hits EVERY ROUND. The chances for a crit at 15-30 fatigue should be 1 in 36, since it requires a one on both dice (open ended rolling doesn't kick in til way later). He's only taking 21 swings per round. In addition, even if a crit lands it only has about a 50% chance of doing damage (half his prot value still is equal to the damage of the attacks).

The crit system as described in the rulebook does not mesh with reality. I've observed this phenomenon time and again while playing with SCs, but now I actually sat down and counted swings.