How do you deal with the onslaught of glory at the fourth intensity of the lantern? I haven't found a way to reliably make dread as much as i'm getting fascination to keep myself from going insane. I'm so close to achieving victory yet everytime i get too close to performing the rite of the crucible soul to learn the secrets of the universe i go insane because of too much fascination.

I've averted some crisis by talking about winter with the investigators. Even if they are idealistic, and cannot be defeated that way, it still produces reliable dread in 60 seconds. Also notoriety, but that's the cost of it.

Some people say that working with "decrepitude" gives dread too, but I never tried this (i watch my health and affliction too closely).

Well, I'm not sure if those methods can be called fair but they certainly are effective ways against both fascination and dread.
First, use fascination while promoting followers. Just keep a bunch of unpromoted guys, then promote them with lore of your aspect and put fascination into trappings slot. It accepts any kind of influences and devours it.
Second, sacrifice fascination in rites. If you have enough Grail lore, you can summon tons of Raw Prophets just as a a way to dispose of fascination (it has moth aspect).

Dreaming about the White Door gives you a good chance of getting the Restlessness influence which decays into Dread