I'm getting kafe, insomnia, and waterwalk.

Not to be bothersome, but I'm curious, has there ever been a Bard (Harbinger or not) who's managed to use Glamours effectively in accordance with their other skills? That chasing of two herb balances is really troublesome, and Flare is to power intensive among other things. I was told to just focus on my main skills instead of even trying to use it, except for HypnoticPattern and maybe Maelstrom is pre-setup. But otherwise, the balances are just... painful.

The only way I've used it to any effect is to weave a Colour Maelstrom/Rainbow Pattern and add that to my passives. Mazing people in group combat is also an effective way of splitting small groups. I always keep up Illusory Self as well, being as squishy as a faeling bard is.

Also weave hypnotic pattern. You'll love that plus dodging. Besides those, you are correct, it's not feasible to chase to herb balances and get anywhere useful. It's possible, but not worth it.