That's strange : I'm playing a game with Mis2 scale, and in 30 turns I had NO bad events, 3 GOOD ones and a hero came up turn 12 or so..
Then I ran a couple test game with Luck 3 (Hit "Host" for 20 turns), and each time I had at least 2 BAD events, and 2-3 good ones ...
I know these tests aren't statiscally significant at all but it's disturbing, it's like the scales didn't matter at all, or worse they work in reverse !
In the end I don't think the Luck scale is worth the points, and Misfortune 3 is a no brainer (or maybe -2 to have some chances for hero ).