Get behind him or wait it out.
The charge ends after hitting an enemy champion.
Instead of returning to base, farm neutral monsters until your ultimate can heal you.
This stab slows the first enemy champion hit, or stuns them if Fiora blocked an immobilizing effect with this ability.
based on his missing Health.
Set them up in your team's backline before fights break out during sieges to help your team deal damage to the enemy frontline.