Guild Wars 2

Why do you scale healing power different for different classes and skills? Shouldn’t skills scale 100% of healing power. If not, 5% scale of healing power for Druid skills is too little. Need at least 50-75% of healing power. Not less.

The reason is “balance”. If everything scaled at 100% of your healing power the moment you do 3 things you could be 100% health. So they make it so abilities have a guaranteed min heal. Then do a scaling based on your gear. Or : y=mx+b

As I said, for balance reasons it is easier to tweek a few numbers to get something just right than one number you can never get right.

The interesting bit is your damage skills (weapons, utils, traits, etc) do this too.
For instance take a look at Guardian Sword Auto Attack #1:
http://wiki.guildwars2.com/wiki/Sword_of_Wrath
This skill only applies 80% of your attack power.

This is one of the reasons we dont have dedicated healers, having healing power as main component its useless cause the scale is poor even though most healing skills have increased cooldown.

Healing power coefficients vary from skill to skill because of several factors, not the least of which are whether the skill offers a healing burst or regen, and how long the cool-downs are between applications.

This is how every other ability in the game (as well as basically every RPG I can think of) works with power / condi damage.