Hi
This is actually a REALLY good question, because comparing "treats" vs. staples regarding a dragons diet are often a big debate topic depending on the research and/or the in the individual dragon owner - and lots of people have their own strong opinions on what constitutes as a treat.
In my own personal experience, I have used supers as a staple for my 10 year old girl the majority of her life. When she was a hatchling, I initially used pinhead crickets, and enlarged the size of the crickets as she grew. I also used phoenix worms to pack that calcium punch
At around 6 months, I switched over to small and medium supers - and whether it was right or wrong, stuck with them. I also introduced dubia at this time as a part of her staple diet.
Blue does love them - they are her staples along with dubia. She readily takes both, and she loves a good butter worm, wax worm, and hornworm now and then. She is healthy, she has never had a weight problem - I mean she's definitely not skinny - she's "curvy", but she is within the weight ranges I see online when I google the topic. Her weight doesn't really fluctuate, even after she completes her yearly 4 - 5 month deep sleep brumation. I know there are other issues than weight to take into consideration with your staple feeders, but just from my own experience - I have had success with supers as a staple, mixed with dubia - which is, by comparison, a leaner feeder.
What's your dragons name, and what feeders does your dragon like the most? Did you have a particular insect that you were thinking about using a staple? Hopefully you will get a variety of responses to this question with thoughts and opinion - its a very popular and interesting topic!