Charmer class get neft a lot. However Energy Manipulation get nefted is not reasonable, the skill doesnt work in PvP, it's the energy regeneration that matters not the amount of energy the enemies have, they even don't care about energy parameter in equipments, recent released gears almost give energy regeneration in all kinds of boots, also the bonus energy regeneration from gear set.
=> Energy regeneration >> Energy amount!!!
In PvE, i see bosses don't care how much energy you drain from them, they have 300-1000 mana(their skills costs equal energy to player skills), they also have 10% energy regeneration!
On the other hand, the skill get resisted by bosses, it's like 1/5 chance of successful use, with new neft im supposed to spend 25% health for 30-100 energy(most charmers have >=4500 health(lvl28) even ranged charmers). Moreover, the 2s interruption between expert skills and a "hand-in-the-air" action.
=>small impact, quite risky and delaying!!!
p/s: i don't mention of <28 lvl players, they definitely dont buy the skill , and of other small mobs, they only have 100mana, dont take a bar of energy to kill!!!