diaglo
Adventurer
I know that Mongoose Publishing has never been an EN World darlin', but I have to say that some of their earlier titles like Necromancy: Beyond the Grave, Demonology: The Dark Road, The Quintessential Witch and The Quintessential Rogue were some of my favorite 3PP purchases and I still enjoy them to this day.
this post reminded of The Quintessential Fighter... which was another product that beat WotC to a release of an area in the game. mass combat.
it wasn't very good. but it was the only thing available for this version of the game at the time.
others obviously learned from Mongooses' fast and furious pace to publish and leave out things or test them before release. as proved by better mass combat products after this one.