Threadlock / locktite and grease

Yes. I'd stick with what you've done regarding the tapers (i.e. not greased). It's a big debate that I can't be bothered to participate in, but to my simple mind I don't see how a taper fit can fit properly if there's a layer of grease in there as well. It's not a bad idea to follow the manufacturer's instructions either.

you have an *interesting *point about the grease there. I believe the debate is about the relationship between installation torque and how high up the spindle the crank arm will sit, as in the greasy case the friction between the tapers will be reduced.

I grease mine purely so they come off easier.