Improvements to the Possessor class. Original by Velk, with fixes and tweaks by mannendake.
Specifically, full control grants 2 talent slots per level instead of 1, and will grant up to 24. This fits the "vanilla" maximum with 0.40 mastery amulet, a category point, and adept granting talent level 12.

Assorted improvements to the Possessor class

This mod should allow you to possess all ranks.

At the highest level of the Possess talent, it enables you to possess any rank of enemy, including Elite Bosses.

I recommend the excellent Proper Possession, as well.

Original Mod by zizzo (https://te4.org/games/addons/tome/possessor_fixes): Assorted improvements to the Possessor class (UI features additional info, possess all creature types, heal possessed forms).

Additional tweaks by Kish: Longer duration on summoned forms, lower mana cost on Assume Form and Possess, lower cooldown on Assume Form, update form HP in body storage.

Removes the creature type limit of Possession.

• Allows healing and regeneration while in a possessed body.
• Removes restrictions on the number of creature types that can be possessed.
• Adds useful information to various Possessor-related dialogs and talent tooltips.

Frequently Asked Questions:

• What's the difference between Proper Possession and Possessor Tweaks? Can I use both?
• What extra information does this addon provide?

Adds useful information to various Possessor-related dialogs and talent tooltips.

Frequently Asked Questions:

• What's the difference between Proper Possession and Possessor Tweaks? Can I use both?
• What extra information does this addon provide?