
I'll be honest... I don't see how the second phase is possible. I reloaded several times, tried abandoning the main base to focus on the eastern attacks, expanding to another gold mine... The furthest I've gotten is about 8 minutes remaining.
Both the imperial army and the imperial legion attacking at the same time makes it insufferable. You just have about 10 seconds when one attacks for the other to arrive. You can't even try to engage them aggressively because the imperial shore fighters like to drop right on Ira so you need to be able to defend her.
Also, near the start of phase 2, the east legion and the shore fighters attack you in the west just before the eastern enemies attack. Meaning you practically cannot defend your base without losing Ira. I tried building towers, but even when starting them the moment phase 2 started, they weren't finished by the time the east legion attacked.
And even when I was lucky enough for my towers to survive long enough to defend my base and I managed to hold on to both Ira and my base... the 9 minute 30 attack destroys me. I have all my heroes and 74 food of army in the east, and I cannot for the life of me defeat the imperial army and legion's attack. And even when I survive more than a minute, the shore fighters drop behind me, destroy whatever towers I constructed to protect Ira and finish her.
Overall, I'd say even if we only had to deal with the eastern attacks, that would be quite a challenging defense chapter.
I think we need way more time to actually build up defenses and build an actual army (I'm pretty sure Shadowmages would be awesome in this section, but I was never able to do anything else than replace my constantly dying Banishers).
Also, the western enemies need to either be severely toned down, or they need to stop attacking at the same time or just before the eastern armies. Maybe they could also have a few less heroes, especially the starfall hero (makes towers almost unviable to defend) and the paladin (he can just keep surviving with divine shield when you need to deal with enemies quickly to get in position for the next attack, or go straight for Ira when he's invulnerable if he feels like it).
Sorry for the rant. It's just that I played a good part of the True story on hard, and despite that, that single section on normal is genuinely the hardest level I've ever played. I don't know if someone else managed it or how they did it, but that's beyond my abilities...
Edit : As a precision, I downloaded the map this afternoon, so I played on the latest hotfix.