These builds aren’t min maxed or optimized. They’re just ones I like. Speedrunner doesn’t have Champion because I prefer the Natural Explorer/Favored enemy to an expanded crit range. It’s also kind of a significant part of the build as it’s what gives heavy armor which I like having on that build.
Same with Flashbang. It’s not missing major components at all. Luminous armor creates a radiant shockwave which is a tiny bit of extra damage and the potential for more R.O. But that only activates on radiant damage and the builds only radiant damage is from Spirit Guardians. The shockwave would only activate in the same area as the guardians. Meanwhile Yuan-Ti cranks your AC higher and makes you harder to kill which is the point of the class, zipping around enemies and applying damage while they can’t stop you. As for the glow ring, I just sort of forgot it even existed. Can add a tiny bit of extra damage (or trigger localized shockwaves if you want the Luminous Armor) but isn’t an enormous boost. I usually go for Ring of Regeneration in act 3 to protect the cleric just the tiniest bit or Ring of Free Action to make sure that the cleric can move around the battlefield and not lock up immediately.