So i logged on my druid for the first time since 4.0.1 and i found this glitch that gives rogues and feral druids an extra 180 energy, so their max is 280. For druids just go into catform and use a Elixer of Sages which raises mana by 180, for some reason it raises energy for rogues and feral druids by 180. This effect lasts as long as you have the buff from the elixer. Druids and rogues have fun topping your dps charts or raping everyone else in PVP, hope i could help
My rogue friend confirmed it worked for him. Were on US-Sargeras