I've been experimenting with different T13 builds before season 12 came out and went through nearly every build possible.. Sweep, Invoker, Akkhan variations including Blessed Shield. Speedfarming with Crusader was always a big problem. Crusader can't infinitely teleport, dash, vault or run as a chicken. The only mobility skill is Steed Charge but it does next to no damage in T13 and have no complementary legendaries except Swiftmount. On top of that, most crusader builds are pretty stationary and tanky, which really hurts clear speed.
Outside of LoN bomb and Norvald Akkhan Bomb there was never even remotely good builds that could clear T13 in 3 minutes. And to be honest i never liked bomb t13 variants, since it's always very annoying to wait for bomb animation. It literally takes forever. Also you need a lot of thorns rolls for that and speed will still be far from monk's or dh's.
With buffed Condemn gear it's now possible though. Like i mentioned before, i tried everything., and nothing, including Blessed Shield is close to Condemn in terms of clear speed and efficiency. I also looked at existing builds out there (and there's a lot of them i know) and unfortunately could not find them optimized enough. Some of them used generators, some relied purely on goldwrap to survive, some struggled with CDR.. Some demonstrated decent 3 min clears.. well.. without gathering anything. So in the end, like it usually happens i had to do my own build.
This build is pretty flexible, can definitely use Sages if you need DBs, can survive without Goldwrap and has no CDR problems. Also it gives me consistent 2-3 min clears, gathering all dbs, gems and legendaries with around 2 mill dps. Even with lower DPS it will be still effective.