she's a spirit battle-quester made for the heirs of numenor nightmare scenarios (and she's awesome for clearing overgrown trail)
it's possible to ready her multiple times per round by using effects to clear locations during the combat phase, which is fun to pull off, but not very consistent. glorfindel is better than her in the vast majority of cases, and there are plenty of other powerful spirit heroes to choose from (even other attackers now that we have lanwyn)