These Wyches are from the Cult of Strife and are opposite sex from the previous set. Pretty much straight out of the box other than the Hydra Gauntlet Wych, who has an old 3rd edition torso, and a custom falchion sword since that's not an option anymore. The razorsnare might be from the Scourge kit.
The Beastmaster is a conversion that pays homage to the old 3rd edition Beastmaster look.
The head is a wacky one from 3rd edition- believe it or not, I shaved about 1/8 inch of hair off the end! He's got a greenstuff cape and fur stole as well.
The weird beast is a metal figure, I think it was from Mega Miniatures. I can't find any details on it. Looks like the sort of thing Dark Eldar would put in an arena battle.
My favorite of the bunch might be this Hellion. I used a 3rd edition head and torso, and matched the color scheme of the illustration on the counter for the Arena of Blood game included in White Dwarf.
I also knocked out a 'new version' Beastmaster on the skyboard. I may make a Razorwing Flock for the arena someday.