Laptop coolers do exist for a reason, saves burning our laps
Make sure power option is set to high performance and not balanced, this can restrict the CPU. (will make more heat though most likely)
Give Fullscreen Window a try if you run in fullscreen to see if it helps
In the Nvidia Control panel try these settings they may help
go to "manage 3D settings" > "Program Settings" > "Add" (find the swtor.exe from the installed directory) > "Maximum pre-rendered frames = 1" give 2 a try as well for comparison.
> "Multi-display/mixed-GPU acceleration = Single display performance"
> "Power management mode = Prefer maximum performance"
> "Triple buffering = ON". Turn to OFF if you do not use Vsynch
Can you try the following settings and see if it also makes a difference, have a play to see what helps
Maximum Character Distance = Low
Draw Distance (FarClipScale) all the way to <0.70
See how that goes first up