EDIT: Just remembered something, this rusalka is immune to holy water! I think that's interesting enough to base a SQ on, such as.
Immunity to Water: A drowned maiden is immune to the negative effects of all water-based attacks, including holy water. :ENDEDIT
Since they entice victims with non-magical songs and allurements, I'm thinking Bluff and Diplomacy, probably augmented with feats and/or racial bonuses.
Oh, the original Rusalka had a much better AC to non-ethereal foes than this version does - the equivalent of AC20 instead of 16. Do we want to improve its AC or assume its incorporeality is enough to compensate for the lower score?
Definitely racial bonus, with feats as added possibilities. +8 racial?
I'm comfortable either way.
How about we simplify the vile wake to granting her cover (which happens to impart a +4 bonus to AC)?![]()
I like the drowned maiden's ability to wash away her foes.