Admin Site Enhancements
I use Admin Site Enhancements on every site I create. I usually have the admin menu set to 200px, so this creates a problem with Fluent Cart, as the admin area does not resize and also doesnt have any vertical scrollbars, so becomes unusable. Unfortunately I have had to go back to Woocommerce until I can sort this, maybe with a code snippet.
I also use ASE, but also found conflicts with fluentAuth, with login related settings and other settings. What is the main thing you use ASE for? I only have the free version of ASE. Do you find the pro features indispensable?