Her damage is what makes her shine, aswell as her pesky ability. Try her out, if you like her keep if her, if not then swap back
So like Kunfu said her damage can make a big impact in Elo, especially for a 3 star, although she is a bit weak without her bonus.
Maurice -> Oxen
Pan -> Rubie
Mawpin -> Phyllis (this fixes having too many 5 power characters)
Edwin -> Your choice of Azgroth, Glorg, Azel or Dudley Ld
It's my rule never run Uppers with less than 5, so you get 93% of Uppers bonus, 50% chance of Nightmare bonus, and you still have 43% chance of double bonus. The Nightmare bonus is gravy but you should be fine without it for your characters particularly Artus.
I'm not sure what the identity of this deck is, as you can potentially run 3 fairly similar SOA characters (Glorg, Rubie, Wendel).
Wendel is very bad ,only soa when he attacks but if he attacks your enemy know you wont overpill like crazy 6/2 is nothing. Rubie on the other hand anytime usable especially ability soa is very valuable even sob clans have to face that.
Nellie 5/6 natural stats with power reduce, soa kills it , Oxen is the swap for her much more stable and soa only messes with his dmg.