I've ran the Big Waagh and had some success, but I tried out pure IJ today and man do they hit hard. I ran 12 pigs in Gorefist and a Mawkrusher under Ironsunz and ended up tabling two games. The pig alpha with Fury and charging Hackas has crazy mobility and damage out put. I also ran a super aggro Maw by Mighty Detroyer turn one and walk (24 inches), got the Get Em prayer off every time and 3D6 charge anything I wanted. I got 6 Strength in Victory bonuses in the second game to get up to 21 wounds.
I cant believe the damage buff pure IJ have gotten since the last edition, I'm very surprised in this damage spike.