I guess I don't see why Threepio was a particularly groundbreaking upgrade to the Falcon. He provides, at most, 0.625 evades per round (or, rather, he provides exactly 1 extra evade 62.5% of the time).
But the standard deviation is zero. In a tournament setting, anything to minimize bad luck against you is really important, no?
Absolutely, and that's one of my favorite things about it. What I was trying to get at is that while Threepio pegs your number of evade results at max (once per round), it doesn't move the needle outside the typical range.
On average, that means you have to take three rounds of focused fire for Threepio to be better than Hull Upgrade, and four rounds for him to be better than (the crew version of) Chewie.
Three rounds? 0.625 per round * 2 rounds = 1.25 (statistically average) damage > 1 hull
4 rounds compared to Chewie crew makes sense. 4*0.625 = 2.5.
But if you have bad rolls, C-3P0 matches Chewie crew in just 2 rounds.
...this is what happens when you're in a hurry and you use ">" in a formula when you meant ">=".
So let me revise as follows: it takes just two rounds of attacks for Threepio to beat out a Hull Upgrade, and three for him to beat out Chewbacca (the modal result of three draws at 62.5% is two successes). Still, the median result for three ships with 3 Attack hitting the Falcon for three rounds is 17 damage, and that means Threepio has to be working pretty hard to buy the Falcon an extra round of life even against a relatively weak list.
