If you don't want crazy strays and you want to "tame" a little dreadballing is a possibility depending on your hair type, I know people who do it, I do something similar, not for maintenance but rather out of boredom, just playing with my hair find a few crazies and I just start rolling them up tight to the lock and they get sucked in eventually.
As far s dandruff I take a more personal approach. Just like poeple are like don't put anything on your dreads EVER, well stuff masks dandruff. Basically if you want to get rid of it, eat clean, drink water, take out breads and the like. You can rinse all you want but that will really only mask whats going on.
As far as rubberbands, SE has his view, I've never met anyone with braids, cornrows, etc who have had any of those problems. Back when I was 14 I did the whole Kris Kross look, rubber bands for weeks not a problem.
As far as wax, I'm not pro but I am instructional. DreadloackHQ instructs so little wax per length along with recommendations to remove, and give a recommended stop time as well, so they all have their take from hair style to spiritual to etc. But we are all different and have different tastes and expectations. There have been people whose hair didn't dread and got dreadrot going natural and with wax, so that argument can go on and on.
But there are some hair stylists who don't approve the shampoo suggested here because of the residue left behind after washing their kids hair with it. Lots of points of view.
One I'm still in the dark on, are the statistics of weakness of dreads from crocheting. Yes it is a thin piece of metal going in the dread, but if one crochets , then the dread is lightly rubbed and moved, the hair then, technically moves back and said hole is gone. But I digress:)