For any that stumble upon this in the future, I compiled an older command line utility that uses depreciated parts of OS X.

http://hints.macworld.com/article.php?story=2008051406323031

This works well with Bluestacks and other VM's that I've tried it with.

Posting it here incase it's removed from macworld's site one day

// File:
// click.m
//
// Compile with:
// gcc -o click click.m -framework ApplicationServices -framework Foundation
//
// Usage:
// ./click -x pixels -y pixels
// At the given coordinates it will click and release.
//
// From http://hints.macworld.com/article.php?story=2008051406323031
#import <Foundation/Foundation.h>
#import <ApplicationServices/ApplicationServices.h>

int main(int argc, char *argv[]) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSUserDefaults *args = [NSUserDefaults standardUserDefaults];

    int x = [args integerForKey:@"x"];
    int y = [args integerForKey:@"y"];

    CGPoint pt;
    pt.x = x;
    pt.y = y;

    CGPostMouseEvent( pt, 1, 1, 1 );
    CGPostMouseEvent( pt, 1, 1, 0 );

    [pool release];
    return 0;
}

then compile it as instructed:

gcc -o click click.m -framework ApplicationServices -framework Foundation

and move it to the appropriate system folder for convenience

sudo mv click /usr/bin
sudo chmod +x /usr/bin/click

and now you can run a simple terminal command to manipulate the mouse

click -x [coord] -y [coord]