You always need to place hunters in a single stack.

Why is it "necessary"?

And if you use mass spells, prioritize slowing and weakening.

So that Axel can remove them both with a single dispel, which is great in my opinion. Or what? Is casting debuffs more than once already outdated?

That unholy word at the end doesn't need any further comment.

Don't bother, I'll figure it out myself.
The Hydras wouldn't have survived until their turn in 80% of cases, with Axel and his inspiration. More units mean a higher chance of Axel getting to act frequently.
I understand that the move was risky, and I could have cast something better, like vampirism, but I did it this way. Plus, it's not a given that the archers wouldn't have done something bad.
If the Archangel had resurrected some Seraphs, I might have won.
And besides, it's more fun this way).