So this is my favourite Zephyr Prime build!
I really like the combination of all3 umbral mods with adaptation. With his added wind-shield he is an ultra reliable tank, physique in his aura-slot just helps the cause.
As you can guess by the arcanes he is set up to be primarly a melee frame. You can always change the arcanes to something else because projectiles are buffed by [Jet Stream] anyway!
This build doesnt exactly require an umbral forma if you don't have maxed mods but you need it on a fully maxed build. It's up to you what you want to throw into your last madurai slot.
[Zephyr Prime] is well worth an umbral forma if you like his playstyle!