Slider in Audiosuite window

If you know how to do it in RX, you could use this code as inspiration on how to adapt your RX code:

This example takes the first open Audio Suite window (last one to be focused) and increments the Mid Band Gain parameter (test this with EQ3 7-Band)

var pluginView = sf.ui.proTools.firstAudioSuiteWindow.children.whoseTitle.is('PluginView').first;
if (!pluginView.exists) throw "Could not find open Audio Suite plugin view";

//Use this to log a list of all parameter names:
//log(pluginView.children.map(c => c.title.value).join('\n'));

var parameterSlider = pluginView.children.whoseTitle.is('Mid Band Gain').first;
parameterSlider.elementClick({
    actionName: 'AXIncrement'
});