Below is a list of the overland raid mobs that are known. Each link will take you to the page that contains their name, level, location, known loot drops, and strategy for defeat (if known). Thanks to Crippled for the added Strat information on most of these mobs!
APW
Guardian R5
Akym the Assassin
Malfunctioning X-77
Enraged X-83
General Vicus
Archon Travix
Zaraax
Shadowsoul
Dread Lord Malazath
Vahsren the Librarian
Palpenipe the Mastermind
Athriss Essal
Izemgeli the Lorekeeper
Admiral Chrykalis
Senator Demetrius
Varimurus the Subjugator
Sky Pirate Weaponmaster
Shylosia
Brock the Biomancer
Professor Vercel
Commander Cobaris
Exalted X99
Malfunctioning Maintenance Spark
Siliusaurus
I-99 Shiver
Core Processor
Guuloo
Zaygius
Kotasoth
Juffow the Fungal Monarch
Tolaklaw
Frenzied Sporeling