The Tome of Primogenesis

This build ideally encompasses a fair bit of tailoring to those that want to try to make themselves have better damage while also providing buffs to your squad should you choose to do public matches.

Obviously some of these mods can be swapped out for your own tastes if you prefer, which will be noted below.

Understanding the build

First thing of notice is there is no damage amplification mod, like Hornet Strike. The reason being is because your damage will build up over time starting from the Cascadia Flare Arcane. This does mean that Heat will be a must on this book to pull off the damage it could rightly do (the higher the rank, the better obviously).

The next thing of note is given the book is a nigh endless battery you can stack Fire Rate on this Tome, along with multishot, to proc more Heat Status and faster along with activating the Galvanized mods' extra abilities.

NOTE: Of course depending on how you prefer your fire rate and damage, you could opt for Gunslinger instead of Anemic Agility (and adjust the polarity accordingly).

For the Tome specific Mods are up to your personal choice. Since I use [Wisp Prime] with this book, I get an absurd amount of Fire Rate from the Alt Fire with Vome Invocation and [Wisp]'s Reservoirs Ability. So tweak these Mods to your preference if you'd like to have a book that doesn't require the use of Arcane Energize with Xata Invocation or you want to add more Duration to skills with it from Ris Invocation.

Lastly as for the Exilus Slot, I'd generally leave that one un-polarized due to the other abilities it offers. You could also add Lethal Momentum instead of the Canticle mods to help the Alt Fire go farther if you wish.