[Koki]

You're taking way too many casualties. Check out the Top 10 tips thread, abuse Fireball, and maybe play on Easy if you aren't already.

Only humans you should be using at this point are Archers(They suck but there's really nothing else out there yet) and Priests(Double damage against Undead)/Inquisitors(If you're lucky and can find them) anyway. Non-humans are generally better.

As for the troops, there are two ways they "replenish":
- In Darion capital and the Magic Academy(The one in Verlon Forest, not the one just outside the capital itself), new troops will be available each time you earn a new title, which you do by doing quests for the King.
- In some neutral locations, mostly castles, new troops become available if you do the quests tied to that location.