Just for information:
My setup is PLD WAR RDM. Strat is simple: zerg until 50%, sleep, rest to full, zerg the remaining 50%.
I couldn't hold hate the whole fight, so the Killer effect couldn't help at the end, but it was worth it overall.
The Killer effect can trigger on every hit, ie at the beginning, when he can hit you 4-5times in a row, Fe'e can be intimidated on 1-2 of these hits. It won't intimidate him a "full round".
XI Wiki

