Im not understanding the thought that 2 part epoxies are "crap"? The reason they don't work as well on tips is that they have no flex properties to speak of, a lot of the other mentioned adhesives do... that's why they are better for this specific use.
2 part epoxies, like Acraglass, or the Aero industry based epoxies are as good as it gets for what they are intended... when a high tensile, low expansion type adhesive is needed.