Holyforge crit chance?

[Shodo]

I've used holyforge several times now since hitting 55, usually when I know I'll be fighting undead for several minutes consecutively. Each time, in five minutes of near-uninterrupted melee, I get one, *maybe* two crits. Are other paladins getting similar results? Is this working as intended, and just a terrible disc, or am I missing something here? Everything I've dug up online is about the post-Luclin version, so I don't have much to reference.