Life Orb set added, thanks sammao, and Mega Gengar mentioned as a check, thanks Colonel M. Now ready for QC, thank you everyone who's helped so far and keep the comments coming
Actually, now I think that Taunt is probably the best move in the last slot of the Life Orb set (better than sleep talk at least), it does so many good stuff like taunting wall such as Giratina and Lugia (making them much easier to be handled by teammate if it still can't kill them), taunting Groudon if you predict it to Stealth Rock, Taunting GeoXen if you predict it to set up Geomancy, etc. So, you may want to put it at first slash.