Well maybe you had voted because of its amazing power and the fact it is unblockable ... but I had voted for knights as they last longer and can eventually beat a drag ty ... But then again its how you would play with the knights or the dragon ty !!
Factifile for Knights:- Less recovery turns
- Good damage
- Lasts longer
Factfile for Dragon Tyrant:- Amazing damage
- Hits are Unblockable