
Torn Grimoire Pages are usually expensive and not worth using for a few bosses as it digs into profit.
With these new rewards and update, you can easily farm a lot of Dungeoneering Tokens and buy out very cheap pages making this Grimoire very useable pretty much everywhere. It's only 5% less Critical Strike Chance than Erethdor's, but the upkeep cost is insanely good.
This can be used at mid-tier boss enjoyers like the Vindicta Andy's, Afk Slayer or even end-game bosses if you don't want to dig into profits using Erethdor's or cannot afford upkeep.
7% Crit is really good and hope it doesn't get nerfed. It would not surprise me if the page cost gets increased, considering how bonkers the cost is.