That sounds like the way to do it. Plus you can pan the 4 voices, and authentically apply detuning to just the +1 & +2 octaves. Shame to use up both Preset slots for it, though. Personally, I like a slot free for the POG attack or filter features.
Octaves are usually pretty forgiving in the non-Polyphony algorithms. I’ll often use PitchFuzz for 3 octaves, QuadraVox for four, with maybe the Omnipressor [DynaVerb] or another EF / Slow Gear-type effect upstream.