Soul Reaper Melza is built as a hybrid unit, capable of taking advantage both of STR-focused and INT-focused builds.

Her skills scale off STR, and have life-stealing effects which help her stay on the frontlines, and her normal attack is both powerful and fast, similar to that of OG Melza.

INT will boost the power of Dark Matter and Abyss Gate, both of which she learns naturally, as well as the power of her normal attacks thanks to Phase Change. Her Ultimate also scales on INT exclusively.

Sadly, while she can do both physical and magical dps decently, she doesn't particularly excel at either of them, and thus she isn't usually considered a top tier fighter.

However a good build will take advantage of the best of both worlds to further increase her damage output. I recommend to build her with STR in mind, but without neglecting her INT since it will further boost her power and versatility.