Upon checking the torchlight 2 item database, synergy mod, it's got wands like wingwraith and a bunch of other names that sound like they're part of a set. Although the item description doesn't appear to give them a set bonus like staffs, and I can't find mention of where to actually get those wand drops.
Salan is working on implementing the "Elemental Dungeon" which will drop those items and which will be the final step in the storyline of Synergies, effectively completing the mod once it's done, well the gameplay part at least, hes still working on making the correct NPC interactions and story from them + quests from them but once that is done im pretty sure Salan will consider the mod to be completed
currently it's only Drek the Deathdealer that has most of hes stuff done, and even then there is a lot of story missing from him that you as a player are supposed to uncover (the Synergies comic should be somehwere around on the forum which explains all the stuff that goes on after the alchemist has been defeated or something like that
Salan has said that it will drop T2 items, and will also have a few of the remaining T1 weapons that wasn't released in DF (i think that's what he wrote, but it was quite some time ago that it was being discussed so could be wrong).