I personally find 20 nephil braves (or even better,nephil warriors) and 20 nephil archers lead by a nephil chief to be a very good stealth team.Very handy for sneak attacks
With the cost reduced to 10 the braves make good screen or flank troops as well - they can really chew up light infantry and archers in close. Oh and all nephilim are useful for patrols. In 0.5 they'll have forest survival too.