PF Soulbound Doll Alternative for Promethean

Soulbound Doll Starting Statistics
Size:Tiny; Speed: 20 ft., fly 30 ft. (poor); AC: +1 natural armor; Attack: None; Ability Scores: Str 7, Dex 14, Con —, Int 12, Wis 12, Cha 10; Special Qualities: darkvision, low-light vision, DR 2/Magic, Research Partner (Ex); Immune Construct Traits; Weaknesses: Susceptible to Mind-Affecting Effects (Ex); Languages Common (can't speak).

4th-Level Advancement: Size Tiny; Speed 20 ft., fly 40 ft. (Good); Ability Scores: Int +2; Special Qualities: DR 4/Magic, Able Assistant (Ex), Spell Like Ability (Su)

(Assume any ability not specifically mentioned functions as a Promethean Alchemist’s Homunculus)

Homunculus Class Skills: The following skills are class skills for a Soulbound Doll: Bluff (Cha), Craft (Int), Fly (Dex), Knowledge (All) (Int), Spellcraft (Int), Perception (Wis), Sense Motive (Wis), and Use Magic Device (Cha). In addition, at 1st level, a promethean alchemist can choose two additional skill to be  class skills for his Soulbound Doll.
Int Bonus: Add half of the Promethean Alchemist’s level as a bonus to Soulbound Doll’s Intelligence. This replaces the normal ability score bonuses.
Special: As the Soulbound Doll increases in power, it gains the special abilities described below. The Soulbound Doll does not gain the bite and claw natural attacks, nor do they gain the poison effect.
Research Partner (Ex): The Soulbound Doll can assist their master by covering all the topics that he’s too busy to research. As a result of this, the Soulbound Doll gains a bonus on all Knowledge checks equal to half its level, and may make a knowledge check even if they are untrained. The Soulbound Doll also adds their Intelligence Modifier to all UMD checks.
Evasion (Ex): At 15th level, if a Soulbound Doll is subjected to an attack that normally allows a Reflex save for half damage, it takes no damage if it succeeds at its saving throw.
Able Assistant (Ex): At 4th level the Soulbound Doll is treated as if it possessed the Cooperative Crafting feat and shared all item creation feats that the alchemist possesses.
Spell Like Ability (Su): At 4th level the Soulbound Doll may cast Prestidigitation as a spell-like ability at-will, with a CL equal to its HD.