Is there a way for someone with a hex (in this case, a Sylvan Trickster with Evil Eye) to deliver their hex through a melee attack (in this case, a dagger).
I know about Hex Strike (requires the hex class ability and is done through an unarmed strike, so no go) and the Conductive weapon property (requires the supernatural ability to use a touch attack or ranged touch, which Evil Eye does neither). Any other way a melee attack can be combined with a hex?
I am not familiar with a way to do that, outside of some shenanigans with the substitution of fighter weapon groups in Advanced Weapon Training, for fighters only. Wouldn't help you any.
In a home game, I'd just let you take Hex Strike and use the dagger to deliver it, provided you spend that swift action to go with it.