Need some help against dragons

[Brakiri]

Hi,

there are black dragons and red dragons. There are all in stacks of 2 to 4.
Trap would be a good idea, but as i said earlier, they have the higher ini, so they have the first move. Traps are impossible.

Should i use other units?
I tried giants, but they are incredible slow, extremly expensive in regard to leadership, and very rare.

In addition i don't have enough mana runes fpr high magic.

Any other ideas?