On the A319 you don't have any of those derate selections (not in any of those I fly anyway).
The norm will be "open climb" which is max available climb thrust giving max rate of climb in prevailing conditions, or you can choose "vertical speed" and that combined with your selected speed/mach will normally give a reduced thrust as well.
Vertical speed is just not recommended for prolonged periods as it has been forgotten on various occasions and people have been flying themselves into stall conditions at high altitude, and it apparently creates an avfull mess when the coffee is leaving the cups due to odd A/C attitudes
