Which cursed blade should I get after Raven Coves quest?

[lerzba]

I'm doing the quest currently and when I finish it which cursed blade should I get? I don't have one famed or legendary weapon only a Royal Broadsword. I'll be given a choice to get

Bitter End - 68 Attack, Cursed Ice (rank 2) Uses voodoo to freeze the enemy, drain voodoo when damagin the enemy (rank 2), Parry Boost +2

Spinecrest Sword - 77 Attack, Cursed Fire (rank 2) Uses voodoo to burn the enemy, Stun Immunity (rank 1), Parry Boost +2

Nautilus Blade - 71 Attack, Cursed Thunder (rank 2) Uses voodoo to strike the enemy with lightning, Critical Strike (rank 2) low chance to deal critical damage, Flourish Boost +2

Which one of these do you guys think is the best and I should get?