i have tested Valentine Event Boss on my lvl 181 BS , 200Paladin , 50 Spearman and 85 Crusader. I continuously hit 4 minutes and using fruit knife on my characters and I got the following results: 181BS: BS is the only class not missing and gained Romantic Present after 4 mins of hitting . 200Paladin: missing sometimes failed to get Romantic Present after 4 mins of hitting 85Crusader: 100% missing and failed to get Romantic Present after 4 mins of hitting 50Spearman: 100% missing and failed to get Romantic Present after 4 mins of hitting i would recommend the community do not run Event Bosses if you are missing. missing doesn't count the amount of hitting requirement to obtain Romantic Present. it is just a waste of time until the bug is fixed.
I think there's a minimum required accuracy around 70ish? Not sure if it varies between mobs. How much acc did your pally have? Have you tried with basket or maple pop?