As you've gone the extra mile/km to buy a nice corrected flat field scope, surely it deserves special glass too
The Hyperion work well in normal SCTs but the Edge HD doesn't do them justice...and the Zoom is a good EP but a bit narrow at the longer focal lengths. I use the Zoom and Barlow in my travel scope and it's a great combo. The 8mm end of the zoom will likely go infrequently used unless you regularly get very good seeing where you are.
I've found that TV Naglers, Ethos and Explore Scientific 82 and 100 degree eyepieces work really well in the Edge HD 8... if budget allows of course. The ES are practically as good at f/10 for a fraction of the price. The 82 and 100 degree eyepieces give a wider more immersive experience, but is subject to personal taste
Depending on your interests, a 12-14mm is a good range for globs and mid magnification planetary. Depending on your conditions you might want a higher magnification (8-10mm ?), if conditions permit. Personally, I prefer to keep the image smaller and crisper than larger and blurrier. At the other end of the scale, I also enjoy (relatively) wide views using a 40mm and it shows off the capabilities of the Edge series to great effect. I'd recommend something down that end if you like to look at more extended objects.
In all, you can easily get away with 2 or 3