A sort of a help post for the people struggling to get legend dragons.
Messing around with the new breeding update, I found out you can easily get Legend Dragons by simply Breeding Basic Dragons.
You usually need one 5 star empowered Dragon and another 1 star empowered Dragon.
Here are all the combinations I found using two of the same dragons:
Symbiotic Dragon (Legend,Water,Grass) === Sea(5-star) + Sea(1-star)
Hunter Dragon (Legend,Grass) === Nature(5-star) + Nature(1-star)
Super Star Dragon (Legend,Electric) === Electric(5-star) + Electric(1-star)
This also means F2P should have more variety than Kratus Dragons.
(Kratus Dragon was also changed now requiring empowered Pure and War Dragons)