Reckoning

This is another level 900 skills that was recently introduced.

Description :
+0.2% per point chance of doubling a random skill level for the battle if you initiate the combat (Note that this skill does not work with Doubler, Summon Shield Imp or Counter Attack.).

So at level 175, that translate to 35% chance of doubling a random skill.
Now, the description is thrown up for interpretation. If you have 10 skills activated on you, do you have a 35% chance of doubling the skill level for EACH skill (which means each combat has 3-4 skills with doubled levels), or do you have a 35% chance of doubling the skill for one of those 10 skills?
My guess (and I will update this blog if I got it wrong) is the latter, and the algorithm goes like this :
#1 Roll a dice to determine if the 35% is activated.
#2 If activated, roll a dice again to determine which of the activated skill has its level doubled.

Given the above, that means the usefulness of the skill really depends on what skill was doubled.
For levelling, the most useful skills to have its level doubled are :

Adept Learner
I usually hunt with either a level 175 buff or a level 200 activated with guild RP.
At level 175, it gives 35% more xp, so if the skill level is doubled, you get 70% more xp!

Librarian
I usually use a level 225 potion, Potion of the Bookworm. That gives 22.5% more xp.
If the skill level is doubled, that means 45% more xp.

Conserve
With a level 175 buff, you have a 8.75% chance that the attack uses no stamina.
With Power leveller pack B, you can get a level 200 buff, increasing that chance to 10%.
Doubling those odds are great.

Now, if my guess on the algorithm is right, we really don't want the skill doubled to be anything else. In fact, if we can choose the skill, it'll always be Adept Learner. But we probably cannot choose. So here's now what I think will positively impact the way players play. Because the odds of activating one of those 3 skills above diminishes as we have more buffs, we now really want to hunt with minimal buffs. Each additional buff will compete for the doubling of levelling, and therefore reducing the odds of those 3 skills being doubled.