unless my champion can't use Trinity.
Trinity gives me everything better except tank killing (which Conqueror covers)
I can kill squishes faster thanks to Sheen, I can DPS better with AS, I can split push better because Sheen works on towers, I'm still getting good stats, and so on.
Black Cleaver is cheaper and that's really it. You only buy it if you're behind. I see more assassins buying it than bruisers.
It's kind of bothersome.