Yep, skirmish from 1.0 is exactly what you are asking for. It dropped weapons that were equivalent or better than Garuda weapons after you melded them (melding was different in 1.0 so you could have +40 int on top of base stats) and garuda weapons were top besides relics. It wasn't really a dungeon to test your skills as much as a way to train newer players how to do the boss fights in the lvl 50 dungeons. If you were already geared they were pretty easy to do so I guess it isn't exactly what you are asking for.