Brave Weapon + Wary Fighter?

Brave weapons attack twice, and that 2x attack counts as one attack for Brave-weapon users (although things like specials and all that count twice).

You'll never see a Brave weapon hitting only once, you'll see it either hitting two times, or four times.

If you have Brave Lance and Wary Fighter on the same unit then when initiating your unit will attack twice, then your opponent will retaliate once. Basically Brave Lance just turns your one attack into two consecutive attacks.

It's definitely viable, as Wary Fighter mitigates the speed penalty from Brave weapons. It used to be more popular before Bold Fighter was introduced, allowing Brave weapon quads and fast special activation.

Wary Fighter prevents follow-ups.
Brave lance in the other hand is a consecutive attack and doesnt count as a follow-up, so effie can attack twice on initiation while the enemy only once if wary fighter is active.