Depending on your set list & band configuration, I would think that a gigging musician could make good use of the intelligent harmony algos [Diatonic; QuadraVox]. The first can double as digital delay (at about half of the delay time of other algos). I'll use the Quad for 5-voice thickened 2nd harmonies, where feedback isn't required. Reverse delays & reverbs / Crystals / shimmer effects might have their place in your playlist.
That said, my needs for the soon-to-arrive H9 will lean more towards the esoteric [Resonator; UltraTap; Undulator; even Vibrato]. Further down the signal chain, as I'm already well-covered with the standard modulation & time-based effects.