"Is it fine to tell us this?"
Come on, you acted as personal bodyguards to the king and prevented an assassination. I think a little more information isn't such an oddity.
"Delay that 50 000 army for a month with 5 people."
Yeah, nothing unreasonable about that.
Planning to recruit a bunch of adventurers in a month, and after that train them for another. That's such bad time management at a time where you're pressed for time. It's a plan that's going to fall apart if the heroes aren't 100% successful at delaying the enemies.
I'm also thinking adventurers would be far better at guerilla warfare than army troops, so deciding to fight on an open plain sounds like matching strength with strength without trying to gain an advantage.
Air bombardment is a good idea, though.
Snail ain't that special. The taste mainly comes from what you add to it.
Of those evolutions, angel Flare is so much better than the others. Not that the others are necessarily bad. Though judging by their expectations, I expect nothing to change about them visibly.