13 minutes ago, Lunermist said:So... My first thoughts are leaning towards being a Fiendish Sirine (From MM II) /Siren but they don't have a LA because MM2 was the weird child. *sighs* though I'd say its probably at most a +2 (mainly due to its Int drain ability and an 11 hour mass charm person) but they're a fey (instead of Mon Human) though innately have less hit dice (4 v 7) but a better stat line then harpies.
I could Make a Fiendish Dragon... maybe go Wildshaping ranger with Wizard on the flipside or just go ranger and go violently Against outsiders... hmmm.
MMII Errata
Sirine: Fey; 5 ft./5 ft.; 5/cold iron; Concentration +7, Heal +10, Hide +11, Perform (dance) +18, Perform (sing) +18, Swim +15, Survival +10; Combat Expertise, Dodge; LA +4; Wild Empathy (Ex): This power works exactly like the druid's wild empathy class feature.
They are CR 5, So RLA adjustement I would go with 4d8 plus LA +2 for ECL 6. You can choose to add Half-Fiend template for LA +3 for a total of ECL 9.