Guild Wars 2

Just some math to share so if you are looking to get some really effective gear, find out which Celestial pieces are the best to round your build with!
The % increase represents the increase in stat budget. For example, 40% on Shoulders/Gloves/Boots means that if you are looking to itemize for Power/Precision/Ferocity/Vitality/Toughness(Very common in WvW), you’re getting the same 85 points of aforementioned stats as you would with any other set, but also 17 healing power and 17 condition damage on top of that.
So as it goes, most useful Celestial gear pieces from top to bottom at the moment:
119(17×7) to 85(35, 25×2) Shoulders, Gloves, Boots
40%
623(89×7) to 456(188, 134×2) 2-Handed Weapon
36.62%
287(41×7) to 211(91, 60×2) Trinket(s)
36.02%
350(50×7) to 258(106, 76×2) Coat
35.66%
308(44×7) to 228(94, 67×2) 1-Handed Weapon
35.09%
231(33×7) to 171(71, 50×2) Leggings
35.09%
399(57×7) to 296(126, 85×2) Amulet
34.8%
322(46×7) to 239(103,68×2) Ring(s)
34.73%
154(22×7) to 115(47, 34×2) Helm
33.91%
168(24×7) to 126(51, 35×2) Back Item
33.33%

As it is now, too, Infused back Item and Infused rings are bugged and provide less stat points(back item 23×7, rings 44×7).
It is also a quirk how 2-handed weapon provides 1 more stat point to each stat than 2 1-handed would.
And I believe that all pieces should give the same stat % increase, but it is not technically possible because stats are represented by whole numbers, sadly.