I'm still not entirely sure I understand the Able Learner explanation but I'll reread it a few times : ) Would you say it's worth getting Able Learner overall?

I was reading through the skills and skill tricks in your guide to barbarians after looking at stuff for the factotum and I noticed that you made no mention of Acrobatic backstab or autohypnosis. Could either of those help a barbarian? Other people seem to be big fans of autohypnosis but it doesn't appear to be anything especially wonderful to me.