Here's some very general calculated torque capacities per 1000lbs of clamp pressure for typical "10.5" clutch discs (actually around 10.375" dia od friction material)...

organic- 180ftlbs
dual friction- 276ftlbs
ceramic- 293ftlbs
iron- 289ftlbs

From those numbers if a 440 made 600ftlbs, here's the minimum amount of clamp required to hold the torque for various friction materials...

organic- 3334 lbs
dual friction- 2175 lbs
ceramic- 2048 lbs
iron- 2076 lbs

With the typical adjustable you are trying to slip as much as you can off the line without slipping too much in high gear. An organic disc is going to limit what you can do as it loses cof as it gains temperature. Ceramic is a pretty much the same compound as a ceramic brake pad, heat doesn't really change cof much. Iron does exactly what you want as it gains cof as you work thru the gears, which widens your tuning window.

From the above you can also see why ceramic has such a bad reputation for being like an "off/on switch". They are typically paired with a pressure plate suited to hold an organic disc, when they should be paired with a pressure more like that for an iron disc.