I had noise on the second to last cog of a 11-32 i installed after using an 11-34 because i had to put the 11-34 on another bike for a bit. I didn't adjust the RD cage nor did i resize the chain. I suspect the reason is that: i didn't adjust the RD cage, and maybe to a lesser extent because the chain is too long. I'll update this if i can't get rid of the noise. I think that more often than not, people with noisy drive trains are due to user error rather than equipment.
I've been using those chinese alu & steel extra light cassettes.
Also, in one instance, 1 of the tiny torx screw at the back of one of them was getting loose. I think going fwd i'll loctite these before installing the cassette for peace of mind.
There are a lot of bolts on a bike that i find benefit from getting loctite.
And indeed, you have to monitor wax buildup, it happened to me once and it can build up quite fast.