I used to keep my smokes at the hard set 70/70 rule back in the 1990s. That's what just about everyone strived for. Any magazine article, cigar book, or b&m owner swore by the 70/70 rule (70% humidity - 70 degrees) and anything else was kind of wrong. I had a lot of cigars tunnel, canoe and sputter out when not constantly puffed on. I'm no expert, but since the internet boards blew up over the last 7 or 8 years a new consensus by actual cigar smokers have generaly lowered that number to somewhere around 65%. I switched over about 4 years ago and couldn't be happier with the way my sticks burn now. If I have an issue with a tunnel, canoe or faint ember it's either a construction problem or they havn't been in the humi long enough to settle down.
Everyone has differnt taste and expectations from thier own cigars. I'd suggest keeping one at 70% and another at 63% (you can use tupperware) for a month and try them back to back to see if you notice any preference.
Enjoy!!