Solving the 'Small Genny, Big Light' Conundrum

I recently tackled a scene requiring a powerful 18K HMI day-for-night look, but with production only providing a 60kW generator and a tight budget for fuel. My initial thought was to use multiple smaller HMIs to hit the intensity, but that would drain our genny and fuel budget too fast. I ended up running the 18K at 75% output with a 480V to 208V transformer, feeding it directly off the genny's heavier circuit, which freed up head-room on the 208V side for all our other fixtures and distro. This allowed us to light the entire exterior without tripping breakers or over-taxing the generator, significantly reducing our fuel consumption and preventing costly overages. It worked incredibly well, providing the punch we needed without compromise while staying under budget. What are your go-to strategies for maximizing limited generator power on ambitious setups?