The T2 has two implementations of curves that work differently enough that you’ll want to understand the difference. MegaVision’s two curve applications are Capture Curve and Tone Correct; they do basically the same thing in two very different ways.
Capture Curve is MegaVision’s application of a density remap where the 8 bit data you see on the monitor is selected by the shooter from the 12 bit range of the camera. You shoot through the curve, causing the software to select the 8 bit transition from the 12 bit dynamic range. Since Photoshoot™ software automatically maps to 8 bits from the 12 bit capture, this is the preferred application of a curve.
Tone Correct applies a curve as well, but does so differently from Capture Curve. Tone Correct remaps the 8 bit data after the capture so you’re really remapping the 8 bit data (256 levels) rather than selecting 8 bit data from the 12 bit (4096 levels) dynamic range. This curve application should be implemented in a specialized way, where you map highlights only up and shadows only down. If you need to map shadows higher in value, use Capture Curve. If you need to map highlights lower in value, use Capture Curve. As always, do as much as you can with lighting.
Also be aware that Tone Correct maps RGB data. If you need to make a big remap, do it in Photoshop. Take the file to Lab space and remap the luminance only (Command+1), which will avoid changing the color balance of big remaps.