I like putting Ward Armor on all 4 units so each unit gains +12 Def and a much needed +12 Res. Of course, this is also under the assumption that all your units are running Distant Counter (and either QR or Wary Fighter).
Only Unit with distant counter is Hector. Effie has the brave set, Sheena could have distant xounter but I have only gotten one Hector, and Zephiel has Attack 3( thinking of giving him fortress defense).
Effie is fine then if you ask me. Distant Counter just makes it (obviously) easier for you to have some kind of kill potential on the enemy phase, but no one has a bunch of spare Hectors lying around.
I run my Hector with Vantage. Enemies pay dearly if they do not 1 shot him from the get go. If my hector attacks first, its pretty much guaranteed that on enemy rounds they will have to deal with vantage first.