Lower base dmg of all CON change con dur on all set to con of that type scale in dmg.
making your build focus around 1 type of con over just being able to incress dmg everything.
so like if took one set like Superioer Rune of the Krait change it to
1. +25 condition damage
2. 10% bleed dmg
3. +50 condition damage
4. 15% bleed dmg + 25% chance to cause bleed on being hit
5. +100 Condition Damage
6. 20% more bleed dmg when you use elite you cause bleed, torment, posion to foes
This also make it easy on Anet to fix changing everything on Gobal scale. and nerf the hell out of Epidemic make everyone in WvW happy xD.