Making adjustments to some of the salient feats. Making them more rational, while adding utility to the Psiotheurgy skill.
Advanced Being Skill Affinity [Advanced Being]
An advanced being with this feat finds within its own nature the effortless use of skills, the advanced being able to use skills to a high degree of proficiency with only a small amount of knowledge. Its abilities are boosted when making checks.
Prerequisites: Advanced being
Benefit: The Advanced Being receives an psiotheurgy bonus to all skill checks equal the ability modifier of its Psiotheurgy skill, as if Psiotheurgy was an ability score. Additionally, it the advanced being adds its Psiotheurgy ability modifier to ability checks or opposed ability checks. For example, an advanced being with 30 ranks in Psiotheurgy gets a psiotheurgy bonus of +10 to skill checks, and an untyped +10 bonus to opposed ability checks in addition to its normal bonuses (if any). Additionally, all skills are considered class skills for the advanced being.
Note: Because this is a psiotheurgy bonus, this bonus overlaps (does not stack) with the psiotheurgy bonus for casting an epic spell as a psionic enchantment.
Rule Undead [Advanced Being]
Creatures that can be turned or rebuked are in awe of the advanced being. The advanced being turns or rebukes creatures with ease.
Prerequisites: Advanced being, ability to turn or rebuke creatures
Benefit: The Advanced Being receives a psiotheurgy bonus to Effective Turning Level equal to the ability modifier of its Psiotheurgy skill, as if Psiotheurgy was an ability score.
Evolved Leader [Advanced Being]
An advanced being has leadership qualities far beyond ordinary creatures. Creatures are naturally drawn to the advanced being.
Prerequisites: A leadership score.
Benefit: The Advanced Being receives a psiotheurgy bonus to its leadership score equal to the ability modifier of its Psiotheurgy skill, as if Psiotheurgy was an ability score.
EDIT 1: Updated mystical reservoir. 150XP per level per day is too generous, and lessens the worth of bolster mystical reservoir. Reduced to 100XP per level. Bolster remains the same at 25XP, which is 1/4 of mystical reservoir.
Mystical Reservoir [Advanced Being]
As an advanced being your well of power is deep indeed. You can draw on this well of power to fuel spells, powers, and magical item creation.
Prerequisites: Advanced being
Benefit: An XP cushion of 100XP per character level per day to be used for spellcasting or psionic manifesting costs, whether epic or non-epic. The mystical reservoir allows for item creation equal to 100XP per character level per month.
EDIT 2: New salient feat.
Focused Spell Power [Advanced Being] [Psionic Enchantment]
Through hard training and inclination as an advanced being, you have a strong affinity for spells from your chosen school.
Prerequisites: Advanced being. Epic spell focus the school selected.
Benefit: You gain a bonus that increases his effective caster level for purposes of determining level-dependent spell variables and for caster level checks equal to the ability modifier of its Psiotheurgy skill, as if Psiotheurgy was an ability score. For example, an advanced being with a caster level of 30 and 30 ranks in Psiotheurgy gets a psiotheurgy bonus of +10 to caster level in the school of magic selected, thus having a caster level of 40 in that school.
Special: You can choose this feat more than once, selecting another school of magic as detailed in the prerequisites.
EDIT 3: An option for less intelligent advanced beings, such as a dragon that wants a stronger focus on combat.
Psiotheurgic Spellcaster [Advanced Being] [Psionic Enchantment]
Psiotheurgy is the focus of your arcane abilities instead of intelligence or charisma (or other applicable ability score).
Prerequisites: Advanced being. Intelligence 25 OR Charisma 25 (or applicable ability score).
Benefit: For the purpose of determining bonus spells per day and maximum spell level, your primary spellcasting ability is the Psiotheurgy skill, as if Psiotheurgy was an ability score. If you have more than one arcane spellcasting class, the bonus applies to only one of those classes. Your spell save DCs are not affected by this change.
Special: You may take this feat more than once to apply to a different arcane spellcasting class.
Psiotheurgic Manifester [Advanced Being] [Psionic Enchantment]
Psiotheurgy is the focus of your psionic abilities instead of intelligence or charisma (or other applicable ability score).
Prerequisites: Advanced being. Intelligence 25 OR Charisma 25 (or applicable ability score).
Benefit: For the purpose of determining bonus power points per day, your primary manifesting ability is the Psiotheurgy skill, as if Psiotheurgy was an ability score. If you have more than one manifesting class, the bonus applies to only one of those classes. Your power save DCs are not affected by this change.
Special: You may take this feat more than once to apply to a different manifesting class.
EDIT 4: With these changes, it stands to reason that the progression of salient feats should be linked to ranks in psiotheurgy rather than level. My original intention was to not break the level system, but keep the strength of the advanced beings connected to their overall character level - unlike the Legends of Athas version, which front loads all of the SM abilities and robs all other advanced beings. Linking to psiotheurgy ranks accomplishes the same thing, but because ranks can be 3 ranks above character level, this nets the advanced beings an additional salient feat. Also a good thing since now there are more salient feats, advanced being exaltation is split into two feats, and so on. Will implement this change soon.