The difficulty of recommending a KISS method, is every tank is a little or a lot different from others. Each tank presents its own challenges, and it takes on average 2 years for it to “stabilize.” As a result, myself and others have to try a variety of different methods, techniques, and equipment, until a solution is found for our specific tanks.
I think part of the problem is that reefs have two distinct phases - new, and mature - and you have to manage them differently. Mature tanks are stable - and generally if you maintain Alk - they do great. We see mature reefs with unmeasurable nitrates and phosphates, and we see them with 1.5ppm phosphates - and they look great. (This is partly because what we test isn't the whole picture - bioavaliable nutrients and available food is more important)
New tanks are inherently unstable - and everything from nitrate to phosphate to alk to all sorts of things we can't really see has to be manipulated and stabilized - and waiting things out and keeping it simple often leads to outbreaks and more problems.(overreacting can also lead to more problems though - its a tightwire act)