A330 might be a bit to much capacity been thrown on LOS-JNB.
It would serve Arik better financially to dump LOS-JKF,ABV-LHR,redeploy the 330 on LOS-LHR,and leave the 738 on LOS-JNB,and sell the 340's.load factors are poor on this routes.
Then again,am only paid to fly,my advise is @#*&^%$^ as far as the J family are concerned!