These days, the latter will likely be interpreted as a misquoted Hunger Games reference in some venues that might otherwise seem sufficiently selective.
I haven't watched Hunger Games. Or read it. I do like that phrasing, though.
Will using it give the wrong impression?
Is there any rationalist equivalent of "good luck"? I've tried a few variants, such as "work well", "knock them dead", "we're with you" and certain situation-specific phrasings, but haven't found anything that worked generally - though a hearty "may all the gods of Olympus be with you!" can serve. Not a vitally important point, but it would be nice to have something similarly supportive and yet accurate to say.