Crit and lucky hit are entirely separate mechanics.
With a 7% crit chance, you have a .07*.15=1.05% chance to reset a defensive skill on each hit
If instead the skill said something like Lucky Hit: Reset a Defensive Skill then you’d have .4*.15=6% chance to reset, assuming you had no other lucky hit modifiers on gear
Im gonna ignore your numbers because theyre not really related to the equation.
Lucky hit proc is calculated by the following formula:
[Skill lucky hit chance * (1+Lucky hit chance increases)] * Effect lucky hit proc chance
So, suppose you have 10% lucky hit chance to heal, and a 15% lucky hit chance roll on your gloves, and that youre using whirlwind which has, suppose, 30% base skill lucky hit chance.
That’s not correct… There is no “base lucky hit chance.” There is only the skills chance… It’s not clear whether additional chance from gear is applied additively or multiplicatively… but it definitely doesn’t lower the chance lol
Elemental attunement with 3 points in it is 15% chance on a “lucky” “critical”. Meaning you need all three things to align.
.4 * .07 * .15 = .0042… or 0.42% chance on a hit.
If you want to maximize it you really need a very high crit chance (you can get 40% from above 100 mana) and fast hitting skills (e.g. ice shards, which while it has a lower lucky hit base, it hits very fast and often).