heh - i played in a 2250 point tournament this weekend where it was enouraged to take stupid things and special characters etc, so i took chakax, kroak and a decent unit of TG, with some skink skirmishers and 2 priests on stegadons for support.
my chakax over the 3 games we played managed 2 wounds on malekith (which were healed back the following turn with his stupid soul stealery spell), and died in every game. for all those points too.... though to be fair, he did keep kroak alive in every game

(only just though, kroak was down to 1 wound in the second game)
imo he's terrible... he's only half decent when in a challenge, so most people will just decline a challenge.