Your luck doesn't affect your enemy's outcome. It only affects what type of critical miss you can get. If someone has a 95% chance to hit you, then of that 5% chance, there is a 2.5% chance that it will be a critical failure; Jinxed makes it so that every miss has a 50% chance of being a critical miss. The type of critical miss that your enemy gets is dependent on only their luck.
If you have 10 luck, it means that your misses will still have that 50% chance of being critical misses, but the affects of the critical miss are the minimal with 10 Luck. I can't say what the worst critical failure is with 10 Luck, but with 6 Luck, you will never destroy your weapon or receive random crippled limbs, but you can lose a turn, and knock down and hurt yourself. With 10 Luck the affects are even less severe.
Jinxed is not affected by distance. Jinxed only affects the people directly involve in the same combat. If two people are fighting each other, it will not affect a separate group fighting each other on the same map, only the people who have hit the person with jinxed or the people that the person with jinxed has hit.
