Has anyone attempted a basic D&D or AD&D conversion of these critters?

Okay Here is a stab at it. Please make suggestions if you have any. Some bits were drawn from the "Ulupoka" creature in Nicholas Dessaux's Creatures from Unknown Lands - mostly because it kinda worked and I didn't just want to carbon copy Yuan-Ti.

Drakon’katha
% in Lair: -
Numbers: 1-3 (1-3)
Alignment: Chaotic
Intelligence: 3d6
Dexterity: 9
Movement: 12”
Armor Class: 3
Hit Dice: 11 (d6) or 8 +4 (d8) (37 or 40 average HP)
Attacks: 1 bite / 1 tail or charm
Damage: 1d4/2d6
Save As: Mu 9
Treasure Type: C

Drakon’katha are a malevolent and cruel race of four armed serpent-men who dwell deep in the Dweomer realm. They are milky white creatures with a heavy, viscous tail split in two, a short scaly torso and a snake like head with black in black eyes. From the torso emerge four muscular arms. Many Drakon’katha are Chaotic Priests or Magic-users of various levels, and all of them are able to use telepathy and the Charm Person spell at will. These spells are often used to secure a victim as food.

In addition to having extra arms, Drakon’katha also have multiple vocal cords within a dual larynx, allowing them to seemingly speak from two sources at one time. This ability allows the Drakon’katha to cast two spells per round. As one voice is speaking the verbal components for one spell, the other voice can speak the verbal components for the other, using their multiple limbs as needed. The two spells cast while using this ability cannot be the same spell.

Light Sensitivity): Drakon’katha are immediately shaken in the presence of natural direct sunlight and all magic spells they have cast or do cast while in the sunlight cease to function. Spell effects that simulate daylight have the same effect. They will not engage in melee and will instead attempt to flee from the light.