Well I suppose that conditioning related to stamina, and ability to receive impacts optimally. (The yin if you will of full body movement and resistance).

I'd say core strength, is when you use the most efficient body muscles (especially the smaller ones that I can't typically consciously control) in line such that they form a chain reaction resulting in an uncommon strength like the whip action of a professional baseball pitcher's arm. (The yang if you will of full body movement and release).

I'd say technique is just part of the strategy that were you use those other concepts to optimally protect yourself and the attacker(s).