Yeah I remember you from its forums hehehe. Hope new expansion works for me.
Now about DoF: view mode is when you made an army and walk on world map, there is the "view mode", a buttom like a scope that makes you enter on pve battle mode. But you dont need to do an objective or something... so you can stay there just to heal your units and then leave.
Wich is haunted? That blue one? I have never had that one, only the red dragon and it is pretty strong, but royal is stronger but Idk if its stronger than haunted. Just a tip, you better use it only for range attacks, they are vulnerable to melee (slashing and blunt damage).