Questions about Radially Compliant Rim

First of all, thank everyone who helped me out with the rim stagger question earlier.

The Spank 350 came with a warning stating that it is a "Radially Compliant Rim" and I looked up their website and found a few strict guidelines on how to build it. I have questions related to those requirements:

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* Triple Butted Spokes, of 2.2/1.8/2.0 mm thickness, is recommended (can a DT Swiss competition double-butted work?) * External Nipple Washers is highly recommended (Why is this necessary?) * must be flat head, external type nipples (so this means regular brass nipples?) * Nipple Lubricant must be used between nipple head and rim interface. Lubricant must not be used on thread of spoke or nipple. (Why cannot I use it on the thread?) * Light to Medium Thread Lock, which allows for tension adjustments without compromising function, (example: LOCTITE® THREADLOCKER BLUE 242®), must be applied on thread of spoke or nipple, before tensioning. (would the nipple just get locked up before I get to tension it?)

Thank you very much!