after digging around boards I'm still a little confused on this topic.
what I've seen is, if a creature is immune to criticals, it is immune to bleeds, but what about the other way?
if creature is immune to bleed is it immune to criticals?
what about precision damage like sneak attack?
Normally creatures that are immune to crits are immune to sneak attacks but its not really a rule. Basically a creature is only immune to what the book specifically says it is immune to.