When Yasuo Remorseful attacks and triggers his 'when I attack' ability, can you react with Smokescreen to reduce his might, and does that reduce the damage dealt by his ability?

Ruling: Yasuo's "when I attack" ability goes on the chain and can be reacted to. If you react with Smokescreen to reduce his might by 4, Yasuo's ability will deal damage equal to his current might when it resolves (2 damage instead of 6).

Sequence:

• Yasuo attacks and his "when I attack" ability triggers and goes on the chain
• You can react with Smokescreen to reduce Yasuo's might by 4
• When Yasuo's ability resolves, it checks his current might and deals that much damage (2 damage after Smokescreen)

Nuances:

• The ruling at the local event that Yasuo deals his printed damage regardless of might reduction was incorrect