Valkyr at the moment basically only has 2 abilities, the Warcry and Hysteria, here are two abilities that could replace her 1 and her 3:
___
Replacing her 3:
Ravage Shields
The Warframe lets out a fearsome scream, sacrificing its own shields to empower its melee prowess.
Upon activation, the Warframe's shields are instantly reduced to zero.
For a duration following the Battle Cry, the Warframe gains a significant melee critical chance buff based on the percentage of shields sacrificed.
For example, sacrificing 200 — or whatever unmodded value is — shields could grant a moderate buff, while sacrificing 500 of shields could provide a maximum buff.
The buff duration and strength scale with the amount of shields sacrificed.
Additionally, enemies within the scream's radius are briefly staggered or disoriented.
___
Replacing her 1:
Prowling Pounce
The Warframe channels her energy to activate Exalted Claws, transforming her hands into razor-sharp, energy-infused claws for a short duration.
Upon activation, the Warframe selects a target and dashes towards them with incredible speed.
The targeted enemy is struck with a powerful melee attack, dealing damage and inflicting slash procs.
For each instance of slash damage dealt during the slash procs, the Warframe recovers a percentage of the damage as health (for example, 10% of the damage dealt).