Wife - Mirabella or Feanora?

[Dabrinko]

I did this crude calculation: (See attachment)

How is the attack damage calculated? Multipliers (percentages) first and additions (+3 damage/+5 attack) on top?

Because, in pure "attack" the RS is a tiny bit better than the Sea Dog...

Both have a nice attack thingy (lunge and swipe, respectively), but which one?

I have already played with the snakes in my previous game, so it's pure curiosity on my part. Right now, I'll switch to the sea dogs if I find all the items.