The T51 plan saves finishing with a whip as it's not very efficient for a wonder. I'd personally prefer this for now, as I doubt NH & Lewwyn will have enough resources to take the Oracle as well as Henge. We can save the whip for something else, like another Worker or a Granary (though in both cases the builds probably benefit more from whipping something else and overflowing into them).
We don't stop playing because we grow old; we grow old because we stop playing. - George Bernard Shaw