For 2 edges, get one in F layer, then do F, orienting that one edge and misorienting all the others, then replace the edge that is now oriented with the other originally misoriented edge, and do another F move. This will cause all the other edges to re-orient and the 2 other edges to become oriented. For 6, just do what you do normally for 4, then take care of the other 2 as mentioned above.
Double ninja'd.