I would clone your page to create a text version. In that test version, delete each model one at a time until the page works. Then you will know which model and associated components are causing the issue.
Then you can delete each field one-by-one from that model to see what field/fields are causing the issue.
hint: it is usually long text or rich text fields that cause the this heap issues.
Not sure if it will fix anyone's issue, but Skuid will return heap size error if you try to return too much data on page load. Each individual model retrieves acceptable amount of data, but on page load (when they are loaded together, I assume) it goes over the limit.
Work around: disable Load data on page load, add even triggered action sequence which is triggered when page finished loading, add the models you want to query to the action sequence.
Hope this helps someone.
It looks like you're new here. If you want to get involved, click one of these buttons!