Marilith Monster Build

[SirShua]

Hi all, I'm attempting to convert a Marilith (6-armed snake lady demon) for a campaign I hope to run, and I wanted to build her from scratch rather than convert using the Legacy chapter. I was hoping for some feedback on her:

Marilith Fleet Commander CR: 17 XP: 102,400

Spoiler:

CE Large Outsider (Demon)
Init +9, Darkvision 60ft, True Seeing, Perception +29
Defenses HP: 285
EAC: 31 KAC: 33 DR 10/good, cold iron SR: 28 Aura: Unholy Aura
Saves: Fort +22, Ref +19, Will +17
Immune to electricity, poison, Resist Cold 10, Acid 10 Fire 10

Offense
Speed: 40ft
Melee: Tattooed White-Star plasma sword +33 (8d8+26 E&F, critical Severe Wound [DC 27]), 5 Tattooed, Interposing Molecular Rift Longswords (10d8 +26S), or Tail slap +32 (6d12+25 B plus constricting coils)
Space: 10ft Reach: 10ft
Offensive Abilities: Summon Allies, constricting coils, Multiweapon mastery

Stats
Str +8; Dex +5; Con +11; Int +4; Wis +4; Cha +5;
Acrobatics +29 Athletics +29 Bluff +25; Intimidate +34; Mysticism +25 Sense Motive + 25
Languages: Abyssal, Celestial, Common, Draconic, Telepathy 100ft.
Spell- Like Abilities:
Constant: True Seeing, Unholy Aura (DC 24)
3/day (DC 21) Blade Barrier, Flight (5th level)
At will: Telekinesis (DC 21), Quickened Teleport (perfect, self only)
Summon ally 1/day (Marilith 30%, or 1d3 Glabrezu 60%)
Gear: Tattooed White-Star plasma sword, 5 Tattooed, Interposing Molecular Rift Longswords,
Special abilities:
- Unholy Aura: Applies all the following benefits to 17 chosen targets in a 20ft radius: +4 Divine bonus to AC, +4 Divine to saves; SR 25 against good spells and casters; Immediate save against existing enchantment or mind-affecting effects, immunity from enchantment or mind affecting from good creatures; good melee attackers take 1d6 strength damage (Fort DC 24)
- Crushing Coils: A marilith’s tail slap initiates a grapple maneuver against a target’s KAC +4. Whenever a marilith succeeds at this maneuver, it deals damage to a target equal to its tail slap, and the target must succeed a DC 22 Fort save or fall unconscious for 1d8 rounds
- Multiweapon mastery: A marilith may attack with two weapons as a standard action, and may attack with all 6 weapons and its tail slap as a full action
- Infused weapons: Any melee weapon a marilith wields counts as Evil and Cold Iron for bypassing damage reduction, and gains a +1 Divine bonus to attack and damage rolls (included above)

I'm also short on decent loot to give her besides the swords, as none of the magic items in the three main books fit what a marilith might be found using, and armor isn't typically their jam.

[Dracomicron]

I think modern mariliths would wear armor. The days of "exotic naked snake lady demon" as a compelling image ended when a lich became a game show host.

I could see a mariltih fleet commander wearing a sharp armored uniform. Not that it would be good treasure for most PCs.

[DJEternalDarkness]

Personally, I feel like that's pretty good. For CR17, I may make the AC a bit better, but that's just things I would think about. On the gripping hand, she's great for getting up close and personal with a party.

[SirShua]

I could add the unholy aura ontop of her stats rather than rolling it in, but coupling that with the interposing weapons could make the to hit pretty high