Read from the World of Warcraft client build files.
How Marco's Crackling Gloves Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Marco's Crackling Gloves suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Marco's Crackling Gloves is part of the transmog set Regalia of Celestial Harmony (Shaman only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Marco's Crackling Gloves Fits
Other Items Named Marco's Crackling Gloves
4 other items in the current build are also called Marco's Crackling Gloves. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 103764 (103759 to 103769) were usually added in the same batch as Marco's Crackling Gloves: the same quest line, zone, vendor or reward set.