Without having played her (eg. from the spotlight and wiki), I'm thinking a well rounded AP bruiser type build. Something like;
Merc Treads, Nashor's, Rageblade, FH, Abyssal
Her burst isn't particularly impressive (unless the lol wiki numbers are incorrect, which is entirely possible) and she has no escape tools, so I can't see her working as a pure assassin like Fizz. On the other hand she looks great at sticking to people and her passive is almost on par with Jax (less single target, more AOE) so I think she'd work well as a bruiser who jumps into the fray and whacks away at the most vulnerable targets while her shield + armour / resists keep her alive.
Basically a standard Dom bruiser, except she does mostly magic instead of physical.