the incubus' powers should be compared to the sucubus' 1E powers, since some things have changed. for example, no psionics for demons in "official" books, so none for inky either.
some preliminary stats for the incubus:
Incubus
Medium Outsider (Chaotic, Extraplanar, Evil, Tanar'ri)
Hit Dice: 8d8+X (X hp)
Initiative: +X
Speed: 40 ft (8 squares), fly 60 ft (average)
Armor Class: 22 (+X Dex, +X natural), touch X, flat-footed X
Base Attack/Grapple: +8/+13
Attack: Claw +13 melee (2d4+5 plus energy drain)
Full Attack: 2 claws +13 melee (2d4+5 plus energy drain)
Space/Reach: 5 ft/5 ft
Special Attacks: energy drain, spell-like abilities, summon tanar'ri
Special Qualities: damage reduction 10/cold iron or good, darkvision 90 ft, immunity to electricity and poison, resistance to acid 10, cold 10, and fire 10, spell resistance X, telepathy 100 ft, tongues
Saves: Fort +X, Ref +X, Will +X
Abilities: Str 20, Dex (14+), Con X, Int 10, Wis X, Cha X
Skills: X
Feats: 3
Environment: Infinite Layers of the Abyss
Organization: Solitary or pair (1 incubus and 1 succubus)
Challenge Rating: X
Treasure: X
Alignment: Always chaotic evil
Advancement: 9-16 HD (Medium)
Level Adjustment: +X
An incubus is 6-7 feet tall, and weighs about X pounds.
COMBAT
Originally found in Dragon Magazine #54 ("Dragon's Bestiary," October 1981, Craig Stenseth).