I've never experienced reciprocity failure when printing but you might consider accommodating for "dry down" where the dry print will appear darker than it did wet in the fixer or wash. My experience and impression is that most of these photographic nuiances and effects are personal for each photographer and darkroom (doing the same thing I do in my darkroom may give you a different result in yours). Charts, graphs, mfg's recommendations and advice should be a starting point and tweaked to give you the result you desire.