glad coltraz pointed this out because its an odd decision.
i use tyrfina in around 60-70% of my PvE teams.
i understand that you may be trying to compare her with other monsters with less restrictive instakill moves however that isn’t all she brings to the table.
her Purifying Mist is quick enough to protect you against the majority of frontline setups. her ability to heal off hold ground is great and since she had such high speed she is a good controlled entry type monster which can lead to multiple protectors defending your team.
ngl i don’t know what her SS is since im able to use her in 2nd form just as effectively. lol.
for me she is borderline S- for general PvE. A at the least.
worth noting that she has really high attack so bloodthirst can deal pretty decent damage even uncharged. obviously vs non buffed.