Paralysis sucks here, it lasts less than two of Beowulf's turns -and- it doesn't shut off evade either. Rule of thumb is turn two status that lasts less than two turns = eeeeeeeeeeeeeeew, on average you don't make up for the time you waste trying to land it. Rauny also has good accuracy, which dampens the magic evade some as well (and in this case, she just resorts to the borderline 3-4HKO physical instead because Beo pdur is now closer to sketchy and Aegis p.evade is trash).
Paralysis is out, but I guess Stone is still turn 2 barely. Not sure I'm giving Rauny double credit unless there are status spells that check both her magic evade and status resistance in game (defender's check and all that).
Beowulf doesn't need both Magic Evade and Thunder Halving; magic evade alone is good enough likely. Rauny also has to watch for the Life Drain/Shock combo, although that is hilariously close. Rauny does just under 30% to Beowulf and Beowulf's Life Drain heals just under 20% of his HP against Rauny
Rauny: Attack (Normal, Beowulf at 70.5%)
Beowulf: Life Drain (Miss)
Rauny: Attack (Beowulf at 41%)
Beowulf: Life Drain (Hits, She just misses the 3-2s, Rauny at 75%, Beowulf at 60.6%)
Rauny: Attack (Beowulf at 31.1%)
Rauny: Attack (Beowulf at 1.5%). So using the basic physical strategy doesn't work too well. She can certainly give up this turn, but Beowulf kills her at the 31.1% HP left, so that doesn't really work.
Beowulf: Shock
What could help Rauny is that the average hit rate could be like 75% and therefore the average damage should be lower for OB? Of course, I guess Beowulf could just hit her turn one (154 damage) and then Shock her his second turn (230 damage with the physical attack. If she's using the magic and doing even more damage, this becomes less extreme. This kills 91% HP by the topic, which is a even slightly high to me because no Bracer, uses HP-consumption attack for Worker 8, etc...).
She could use Lightning and not attack turn 2 and hope to 3HKO him and have him not evade an attack. But this is feeling really spotty. She needs to use Lightning, not have Beowulf choose to resist in a random guessing game of what to pick (and since she can't use both the Lightning and physical and Beowulf's strategy's trump her's here, she really needs to guess right. After all, Lightning halving and physical evade also ruins both at once), still needs to hit all 3 times, and needs both of her potential status evasion calls to be checked.