Expertise Energy Reduction

It seems pretty dodgy. At the moment I have an attribute level 5 expertise. 10 energy skills seem to be 8 enery and 5 energy is 4 I think. But 15 is still 15

A week or so ago 15 was 12 and 5 and 5 and 10 was 10.

your 15 must not be a ranger skill :-p

Expertise doesn't help with everything, it only works on
Attacks
Traps
Preps
Stances
I can't remember but almost nothing from the other classes

ahhh

ok thanks

Expertise affects pretty much anything that's not a spell. Glyphs, rituals, traps, preps, stances, attacks, and so on are all reduced in cost. The only things I know that aren't are spells - hex spells, enchantment spells, and plain-old spells.