[UninspiredName]

In the massive battles where Blade Wind is truly worthwhile, it's precision is usually enough to get the job done. As for fatigue cost, I mostly meant that it mimicked a volley of 50 archers. Even in skirmishes it usually lands a lot of hits, and because they're all at once it will sometimes force a morale check. Then you need to factor in the amount of afflictions the spell will dole out early enough for it to matter somewhat.

Of course, this is only my experience with Blade Wind. I once used six mages and that spell to decimate Jomon's forces, (Standard Samurai) so it can't be that useless in Late Age.