Sometimes I use a hiking staff. Don't think it helps much for hiking, but I have been using it since before my kids were born and they both graduated from college a few years ago. I don't care for trekking poles.
A single LT4 could be used as a staff, meets your weight requirements, and is stiff enough to make a great pole for the Hexamid. I believe Yama makes a trekking pole that would fit the bill too -- you could use just one and call it a hiking staff.
I agree, the standard zPacks pole is too flimsy. I bought a sturdy pole from Ruta Locura that is stiff enough for the Hexamid, and if I remember correctly, weighs around 4 ounces. But alas, it is a dedicated tent pole.
Sometimes you can't have your cake and eat it too.