Guild Wars 2

Nature’s Wrath: Convert 10% of healing power to power. Beastmastery 25 triat. Performance Enhancement (Inventions 25) does the same thing.

Let me tell you why this is terrible. Compare this to Armored Attack (Defence 25). This will give you 116 power at barest minimum. If you are toughness speced, you can get 250 power out of this trait.
Nature’s Wrath gives 30 power at minimum. If you’re fully healing power focused with ascended Cleric’s everything and a healing rune set you can get 150 power from Nature’s Wrath.

My suggestion: Nature’s Wrath (and Performance Enhancement) gives +(Healing Power / 100)% damage. So 30 points in beast mastery gives 300 healing power, so as much DPS bonus as a Major Sigil of Force. In PvP if you run a Cleric Jewel in a Soldier amulet, that’s 4% damage boost. Full Cleric’s is 9% damage boost. Full ascended Cleric’s everything and a superior healing rune set and you can get 15% damage bonus. Realistically this is going to end up at 3.45%-4.25% for PVP (Celesital and Cleric’s Jewel respectively) and for PVE scarsely higher than 5%.

Potential TL;DR math section

If taking a minor trait and reworking it so that it potentially gives 15% damage bonus seems overpowered, first I want it noted that Bountiful Power (Water 25) used to give potentially 20% damage bonus but also I want to give an example of this trait as I proposed it in action.

This is my ranger now:
http://gw2buildcraft.com/calculator/ranger/?6.3|1.1c.h1h.0.0.0|c.1c.h2.g.1c.h1h.0.0.0|5c.7j.5c.7j.5c.7j.5c.7j.5c.7j.5c.7j.0.0.0.0.0.0|2u.0.2u.0.3u.0.2u.0.3u.0.2u.0|0.0.k4a.k59.u67c|0.0|4i.4o.4q.4r.55|e

Manually removing the effects from Nature’s Wrath as it stands now, this gives 2503 “Effective power” Given the build’s 10 percent damage bonus from runes and traits and with my proposed change for another 3 percent and end result is 2828 effective power.

Let’s replace everything Soldier set with Clerics and look at what changes. 1331 Healing power, so +13 damage. Effective power is 2180, with all multipliers, that’s 2682 effective power by my math. The Cleric set character still does less damage than the soldier set. It also has 17432 HP to the Soldier set having 24472.

/math

Even with this buff, Healing Power rangers and engineers won’t be the new meta.

Alternate proposals:
Damage bonus set to (Healing Power / 200)%
Power bonus set as (Healing Power + 916) 0.1 rather than (Healing Power * 0.1)
Healing Power based bonus to power is also given to condition damage in equal amount.