I've been playing for a year and I still don't have elements, I once tried but I'm sure it will eventually arrive good luck to you though
If you see an invite from dragon forest, it's me! I just came to have a look at your dragons. I found many potential elements combos!
Tropic x red rose
Gemstone x tropic (sounds best to me)
Right heart x atlantis
Wild x island
Hopefully one of those nets you an elements! Good luck
Hopefully