Hi Matt,
Again, Welcome to Frog Forum.
May I respectfully suggest you do plenty research as to WHY this should be avoided.
Mixing different species of dart frogs is a challenge even for the ,very ,most experienced PDF keepers.

There are thousands of little communities in the BIG ( hint ! BIG ) rainforest where different species may occupy the same small area.
It is done in captivity..........BUT
It is definitely an advanced keeper's undertaking.
One needs plenty of experience with darts of ALL species.
One needs lots of practice with ,successful, natural terrarium set-ups.
One needs years of observation of each species and their habits.


That's my 2 bits
This is a great topic for discussion
Lynn