Hello there,
This is so-called StatStick for your Warframe, as it increase your mobility.
- Evolution I : Incarnon Form - Reach 5x Combo and then Heavy Attack to activate Incarnon Form. +3 Range. +40% Attack Speed.
- Evolution II: Striking Swiftness - additional +30% Sprint Speed.
- Evolution III: Skyborne Lunge - Increase range of aerial melee attacks by +0.5m. <- very flexible, can pick any.
- Evolution IV: Swooping Lunge - On Airborne Melee Kill: +50% Melee Damage for 10s. Stacks up to 3x. Incarnon Form projectile and Slash, Heat, and Toxin proc kills while airborne count towards generating stacks.
- Evolution V: Armed Inspiration - Collecting ammo grants 5 Melee Combo counter.
As you can see, this is not regular melee build, kind of it is, but at the same time not quite so standard.
The evolutions themselves contribute a lot here, but also the newest system of heavy attacks - Tennokai, opens new ways to use the mechanics we already know. All this gathered together in one place gives us a powerful kick... to gain momentum :D
Enjoy!