Provoke doesn't work on FATE enemies or hunts, unfortunately.

WAR does seem the best for generating the most enmity over a long period of time between its DPS cooldowns and Onslaught, though. I feel like DRK might be better for short term situations like ARR hunts, however, since their DPS/enmity generation is focused strictly on Dark Arts, where as WAR needs to use Storm's Path first for maximum output.