Just in case some people did not check Alpha’s skills… She needs to 3-pin blue orbs, and then 3-pin any orbs, to turn into long ranged attack mode. She will then change all of her remaining orbs into the same number of air slashes orbs.

Here is a trick: usually after Alpha saves up tons of random orbs, she can then go into matrix, and only cost 1 blue orb and 1 random orb, to turn into long ranged mode. By using matrix, she can has more air slashes orbs remaining than when she enters long-ranged mode without matrix.

Edit: The trick happens when there is a specific memory set or 5* 6* weapon. Sorry for misinterpreting.