best camshaft brand

Great topic.
Personally, I've been lucky over the years, but I have almost exclusively used Direct Connection or Mopar Performance cam kits.
And using the proper break in procedures with the right oil helps a lot.
(prelube and start within the first 10 seconds)
And to maintain the cam and lifters, I now use Driven HR2 oil with good results.
Synthetic oil with the proper ZDDP in it is really good too.
I took apart a 440 a few years back with a bent push rod that had been run with Amsoil from new, and the cam and lifters looked like new and were reused and that engine is still running good to this day...
That's one of the things that has sold me on synthetic oils.
That and being able to pour out gear oil in - 40 degree weather.
My next change on my 340 with a comp cams XE 274 will be with synthetic now that the engine is broken in.
Probably Amsoil with the ZDDP that our older engines require...