Farming Outcasts and the Outcast Shield?

I've been farming outcasts along time now, using Glad Tank and VWK, but it's slow and a bit dodgy as it relies on outcasts missing with certain skills eg. leaping mantis sting so they don't wild strike my ass off. I really want that badass shield but have only got 2 poor ones, any suggestions on how to farm these guys quicker?(IGN:Exiled Titan,incase you wana sell one :P)