Still unsure of whether or not to grease spindles but I saw this on parktool
I’ve always greased spindles out of habit, I grease everything else. It might not be necessary, but I’ve heard people suggest it on several occasions.
I usually find clicking that happens only on about 1/4 rotation to be an overtightened chain due to an out of round ring. So you’re tightening your chain properly until it gets to the largest part part of the ring.
the spindle should DEFINATELY e greased, same with perssing in headset cups, generally speaking, anything press fit should have some grease. also, any contact between different metals( aluminium and steel) should be greased, unless you like permenantly locked seatposts etc…
attn zombie carl
perpetually loosening cranks are USUALLY the culprit of the taper wearing on either the bb or the arm(usually the arm is alum and the spindle on bbs is usually steel, and the softer metal will wear first(meaning if you start getting this problem, the crank is more likely the culprit)). usually, this is caused from riding loose cranks. depending on how badly the taper is damaged, you may only have to replace the arm, or the arm AND bb(if its really bad). this could explain why a new bb didnt fix your crank arm problem.
you shouldnt need loc-tite on your crank bolts, grease on the spindle clean threads and alot of tourque should be enough.
also, recently i had the clicky cranks problem, even after regreasing the whole BB/crank interface, turns out, some fresh grease and a little tourque(not too much) on the pedal threads was all it needed.
hope this helps some folks… 
i, earlier today, pulled the arms off and greased up the spindles. just took for a quick lap around the neighborhood with a mash uphill. not a peep so far. we’ll hear what happens within the next few days.