Rauroblade+ or Gleipnir?

I have +spd without -atk on her, and with cavalry buffs I find she generally tears it up without the blade tome unless we're talking abyssal maps or maybe GC upper infernal when cavalry stat bonuses are not in effect because people actually build some tanks to withstand this kind of pressure so a little stat inflation is enough to tip the matchup. But then faster enemies are sometimes so fast that she needs the +3 spd to get a double.