Most Kruphix tech is well-known and can be found on EDHrec, he's a pretty well-explored commander.
One piece of tech I rarely see though is pic related. Even in non-Eldrazi based builds, he gets ridiculous. Kruphix is a deck that's going to draw a metric fuckton of cards, and Nuzilek turns anything that is no longer relevant (like all the ramp spells you're packing because this deck wants to ramp like mad in the early-mid game) into answers.
I've had him in my list since I started playing Kruphix about 8 or 9 months ago, and he's so potent friends I regularly play with call him my "secret commander"