Which Dragon did you pick?

[Granamyr]

Because the paladin phantoms act as a second paladin stack in the army and with multiple phantoms you can do multiple resurrections.

Yes, I'm quite aware of what the spell Phantom does.

Your no-loss strategy though is a reactive one and much harder to achieve. The better route is to not take losses in the first place and thus not need multiple resurrections.

This is achieved with numerous "throwaway" targets like Phantomed Royal Griffons and their Heavenly Guard. It's much easier to avoid losses when you have 3 stacks you care less about that you can put in front of anything that would do you any damage. Contrast that with your strategy of taking whatever damage is dished out and then having to line up all your wounded units around slow moving paladins, using the paladin's turn and hoping you have enough in the stack to rez for more health than the damage you took.