Please, please, please disregard all the outdated information regarding "useless" Fossils. They all changed this league.
Tangled, Glyphic and Bloodstained are all insane now.
Tangled "Greatly favor X mods and blocks Y mods", and they can include unavailable mods to other fossils, such as "Greatly more Auras" without the minions or curses of Bound fossils. Also Greatly is really, really heavy towards the mods they're favoring.
Glyphic fossils include the mods from 1 out of the 4 Corrupted Essences. This Includes allowing you to forge a Weapon with Level 20 Fire Burst [Hysteria only] and other 3 fossils on top of that, granting way less random outcomes (for example).
Bloodstained guarantees corrupted implicits. Always.
These three beasts allow you to craft stuff that wasn't possible before. Want an "Eventuallity Rod" with level 20 Fireburst that favors Fire/Gem mods? Possible now.
Want a Helmet with +4 to Minion Gems? Possible.
Want a Quiver with Cold Damage per Frenzy charge and +1 to Maximum Frenzy charges? Actually easy now, zero effort.
Please, experiment with them. I'm completely broke this league (mostly due to lack of time to play the game), but as soon as I started experimenting with Tangled Fossils, this was the result of ONE resonator.
Please. For the love of god, spread this information among crafting enthusiasts. They'll love it I swear. Just give them a shot.