25 energy, 1 sec cast/activation time, 45 second recharge. It's a chant so it can't be stripped. 25 Energy seems like a lot but at 15 Leadership, you will gain 5 energy back, making this effectively a 20 energy skill. Also, if memory serves me right, paragons had 37 energy while wearing the + energy armor?? Not sure about that....
At Leadership 16 or higher, this skill will last 42 seconds, allowing you to keep it up almost permamently. Every 49 secs, there will be 4 seconds when it will not be in effect.
Let's look at what it will do: It will not benefit your casters, since as soon as they cast a spell, they will loe the + 2 energy regen. However, your warriors will have 4 pips of energy, rangers will have 5 pips, and 'sins will have 6 pips. Now imagine warriors and bunny thumpers spamming Irressistible Blow every 4 secs for pretty much the duration of a GvG match. Bunny thumpers can probably drop Ferocious Strike for the much higher damage of Enraged Lunge. Assassin attacks will no longer seem that expensive in terms of energy. Rangers can spam Crippling Shot all day long. Touch Rangers can drop OoB for Escape so they can make kiting less effective. The paragon himself will gain + 2 energy regen as well, allowing them to use their skills more often too, while ensuring they have enough energy to re-activate this skill when it recharges. A bonder can also maintain a couple more enchantments while under the effect of this skill, as long as they only use Sig of Devotion as their sole heal.
Compare Aria Of Power (at 16 Leadership) to Mantra Of Recall (at 10 Inspiration) - yes I know the attribute levels are different, I'm just doing this comparison since the numbers for MoR at 10 Insp are easily available. MoR provides 1.89 pips of energy regen over the duration of a match, while AoP provides slightly less than 2 pips (due to 4 sec downtime) to all your non-casters. MoR is elite, AoP is not. MoR only affects 1 person, AoP affects all non-casters within shout range on your team including yourself. It provides twice the energy regen of Peace And Harmony (which is also an elite) and can probably be maintained on more players. Also, unlike P&H and MoR, AoP cannot be stripped.
I like the paragon, so I'm not calling for a nerf. However, looking at the numbers and the comparison to other energy management skills, AoP appears to be overpowered. If it's not nerfed, this skill will find its way into the majority of my paragon builds
