Under the Lash

Question: Artistry question: If someone has Divine Fortitude (Sleep) and Tireless Worker, does Work Harder actually give any bonuses?

Yep, sure does. Work Harder applies to all kinds of exhaustion and need for bodily maintenance, so even if you already never need to sleep, it can provide you with the means to stave off other problems. While Work Harder is active, you also get no penalties for that sixty hours straight you spend up to the elbows in a computer processor without being able to go out and grab a sandwich, can't suffer from dehydration if you need to work under insanely hot desert conditions for a few days, and will be able to perform a gruelling, physically exhausting gymnastics routine for whatever nine-day marathon you are committed to performing, even though your Storyteller might normally have levied penalties for so much physical activity even if you don't normally sleep.

Having Divine Fortitude, not to mention lots of Epic Stamina, will of course make Work Harder less needful; if you're already very hardy, you'll have less trouble pushing through as a consequence of your fantastic constitution. If you plan to be a Stamina beast, you may want to pick up Polymath or Rival Reading instead as you go up the tree, since you don't need the boon as much as someone with a more delicate physicality. But even a god of Stamina might once in a while find that they need to do something beyond the pale in their quest for artistic perfection, and in those moments, Work Harder is there for you.