Y’know, I feel that, in a scenario like this, while Zipp would be the stronger flyer of the two and so probably of a higher rank, Pipp would be more of a secret weapon.
Basically, while Zipp exudes danger from her build, Pipp could lull the enemy into a false sense of security, because she seems so soft and fluffy, and then BAM!
I mean, in the latest official comic, Zipp even mentions that Pipp is tougher than she seems.
Pipp: um… sheepish grin
I can absolutely see that, really fits her character