Zero forma build for cheapskates but skilled cheapskates! It actually doesn't require too much skill, but if you like to stay on your toes in battle, this is the build for you.

As per usual, activate Warcry at the start of the mission. Each melee kill refreshes 2.9 seconds, so bring a combo weapon (i.e. [Kronen], [Sigma & Octantis], etc.). Keep refreshing Eclipse for survivability and extra damage. When you take hits to your health, you'll gain energy to use Hysteria, which is more or less your panic button. Slide attack for lifesteal then deactivate, or take advantage of red crits with talon build below (also zero forma). That's all! It's just a lot of juggling and managing abilities/kills/timers, but if you get used to it, it can be really fun.

Arcane Guardian/Grace isn't required, but Grace helps a lot with energy.

Talons: https://overframe.gg/build/155209/