So talking with Pin we've determined that the Luck stat doesn't seem very balanced in the RAW, it heavily favours a lower luck stat, and a low luck stat also makes a lower stat dice more favourable, luck of 1 and a d4 in a stat means you have a 1 in 4 chance of an auto success.
So instead we thought rolling a d12 for luck with each roll would be more balanced rather than a static luck stat. Then if your luck roll matches any of your die rolls then you succeed.
as example Lenora has 1d10 for action, and 1d6 for a power
Fighty power action: 1d10 + 1d6 ⇒ (1) + (5) = 6
Luck: 1d12 ⇒ 6
Neither roll matches the luck die so no auto success this time, but something like that.