Here’s the absolute bees knees of an analogue phaser that is the Mega-Phase 12 from AJH Synth. It has a unique stage selection and separate emphasis (feedback/resonance) stage selection allowing you to duck and dive between phase cancellations, vary tones, more or less resonance and also take it through several “classic” phaser sounds quickly.

As seen and mentioned in the video here’s the Gemini 2412 demo – https://youtu.be/eW6pPYqTtCY