Guild Wars 2

Gear that Celestial Stats are least detrimental to the primary stats.

Shoulders
1.4003 40% more stats across 7 Stats With Celestial
1.6665 66.7% more Stats to a primary set of 3 stats with Noncelestial.

Hands
1.4003 40% more stats across 7 Stats
1.6665 66.7% more Stats to a primary set of 3 stats

Feet
1.4003 40% more stats across 7 Stats
1.6665 66.7% more Stats to a primary set of 3 stats

2H Weapon
1.3663 36.6% more stats across 7 Stats
1.7079 70.8% more Stats to a primary set of 3 stats

Accessory
1.3603 36% more stats across 7 Stats
1.7154 71.5% more Stats to a primary set of 3 stats

Chest
1.3565 35.6% more stats across 7 Stats
1.7200 72% more Stats to a primary set of 3 stats

1H Waapon
1.3509 35% more stats across 7 Stats
1.7273 72.7% more Stats to a primary set of 3 stats

Legs
1.3508 35% more stats across 7 Stats
1.7273 72.7% more Stats to a primary set of 3 stats

Amulet
1.3478 34% more stats across 7 Stats
1.7311 73.1% more Stats to a primary set of 3 stats

Ring
1.3474 34.7% more stats across 7 Stats
1.7320 73.2% more Stats to a primary set of 3 stats

Head
1.3390 33.9% more stats across 7 Stats
1.7423 74.2% more Stats to a primary set of 3 stats

Back
1.3333 33.3% more stats across 7 Stats
1.7500 75% more Stats to a primary set of 3 stats

Shoulders, Hand and Feet are Equal with the same stats.
To bring the other pieces of gear in Line with those 3 pieces of celestial gear:
2H Weapon, Amulet, Ring +2 to all stats
Accessory, Chest, 1H Weapon, Legs, Head +1 to all stats
A net gain of +10 to all stats would make all the celestial gear closer to equal in it’s usefulness.