Sounds good!
Borrow these?
Depart (Su): Once per week, a narra may cast astral projection (caster level 18th). The ability affects only the narra.
Ethereal Jaunt (Su): A narra can shift from the Ethereal Plane to the Material Plane as a free action, and shift back again as a move action. This ability is otherwise identical with ethereal jaunt (caster level 15th).
I'd rather give them a genie's Plane Shift supernatural power.
Move the standard narra's greater invisibility and dimension door to at will? Make greater teleport (self only) at will as well?
Yes to at-will for all three of those SLAs, except I'd make it regular
invisibility.
Oh, and I was going to go for
holy word 1/day for them all as well.
Take the standard lammasu's languages and add telepathy? 60 ft.? Do anything with empathy?
I was going to go for 100 foot telepathy and add a couple of languages for their greater intelligence.
Maybe Abyssal and Infernal, so they can understand what the enemy are saying?
Give them an ability that treats all cure spells as Empowered?
Yes, how's this:
Blessed Healer (Sp): Any healing spell or spell-like ability a greater lammasu casts has all variable, numeric effects increased by one-half. This increase stacks with that from Empower Spell or Empower Spell-Like Ability, so if a greater lammasu cast an empowered
cure light wounds it would do +100% healing.
Speaking of spell casting, what level clerical spellcasting should we give them? The listed spell levels (five 1st-level, four 2nd-level, three 3rd-level, two 4th-level, and one 5th-level spell) correspond to a 9th level cleric, but it then says "They cast spells as 12th-level priests."
A regular lammasu casts as a cleric of a level equal to its Hit Dice (7th level cleric and 7 HD), so I favour making the greater version 12th level clerics to match their 12 Hit Dice.