Who plays with which heroes in the Inferno faction?

Friend, what's the point of the "Sudden Attack" skill? It's better to properly upgrade "Deleb" than to waste points on "Grok's Call of Urgash." Plus, you also gain experience.

Comrade, you still need to reach the level where you can acquire "Sudden Attack," which requires spending 7 levels on it.
The "Ballista Deleб" will become ineffective after 3 months of gameplay and will no longer pose a threat. Only "Grok" is suitable for large or medium-sized games.