I found dart frogs to be much much easier than reefing or planted freshwater tanks.
Then again I only keep easy to keep leucs. I think a tinc would be cool too, doesn't hide, always in the open.
I did a lot of research and the only recommendation would be to keep different types of frogs separate. I know it looks cool to have all the colors of the rainbow but dart frog morphs are looked down upon. So if you raise them few people will want to take them. Also different types have different temperaments, it would be easy for a frog to get bullied and possibly starve to death.
I am by no means an expert, but my other recommendations would be:
-try to get a tight fitting lid on your tank. It will help keep in moisture and flies.
-I don't like to keep my cultures in a sealed contanier like a plastic container. The cultures seem to get too moist and die out.
-Make sure your cultures get light. I keep them in the tank stand with the door open, when company comes over I just shut the door. Now once my 4.5 month old gets to moving this won't work but for now it does the job.
-I have tried different cultures but the best ones are from Josh Frogs (google). Heck, that is where critter gets them too. Buy the media and cups and make your own from them, much much cheaper. I've had to overnight cultures this winter because I was lazy and didn't plan accordingly.
-Research your frog species. Multiple leucs can be housed together but that seems to be the exception.
-You can still go on vacation. You don't have to worry about an overflow, power outage, auto top off going crazy, autodoser going crazy, or the myriad of other potential reef problems.
-Frogs seem to go a week without feeding with no ill effect. If i'm out for more than 4 days I generally have someone feed them every other day. But a a week has happened a few times and I have not had any issue. In fact this sometimes initiates the 'survival procreation' response. Your tank will also have some stray flies that they will pickup during this time.
That's all I can think of off the top of my head. Hope it helped.
-Pete