You pretty much presuppose that druchii will retreat once they take sufficient casualties in their what, elven infantry? Why though. What makes you think that the people running the day to day operations on the Black Ark are the same people as the soldiers we are facing?
Why wouldn't they be? If you dont work, you dont eat. And if you force people to work for you, then they'll gank you the first chance they get.
I'm not suggesting we're killing Bill, Assistant VP of Druchii Grond Marketing.
I'm suggesting we kill each of his subordinates en masse and depopulated his department in its entirety, which means their jobs don't get done, which trails upwards and downwards in terms of fucking over Bill's long term prospects, which affects HR who need to recruit and train up those replacements
All while hoping that their inability to meet this absurd challenge doesnt get all of them sacked and replaced by someone more ambitious and eager to take their position
Elves take the long view of things. It's their nature. And if they could satisfy their egos by running all their infrastructure and keeping their slaves in line by themselves theyd never bother recruiting a power base in the first place.
People are hired because jobs need to be done.
It's a basic logistical reality
We kill those people. Their jobs dont get done. That fucks over their bosses, and so on and so forth.
Edit: And in a hyper competitive market like Druchii society, that kind of weakness results in a death spiral if not impressively managed in the immediate aftermath.
Edit2: Like, normally sheer volume of chaff would mean that this logic wouldnt apply, as there would still be more expendable fodder where the previous waves came from.
But due to the various plays that the Druchii made in setting up the battle thus far they have already tapped that well.
There are no more screening harpies in the air. There are no explosively inclined Bound to force breakthroughs and hurl.at walls to melt them.at cost to their own lives
As the update illustrates, we're past that into the meat of the Druchii forces. The ones they invested because they feel it's worth letting them survive more than a casual glancing blow on the battlefield.
By definition they are worth something. Which means that their loss will be felt. Even if it's a pinpricks worth individually, en masse that will add up.
Artillery to hem them in.
Flagellants to punish grouping up.
A cavalry charge to break apart any concentrations of force.
All to funnel them directly into the gates before they can close again, where our Ogres are waiting and ready.
It's a perfect corralling setup to turn the path of the cavalry charge into a charnel house, and that's the best kind of thing to teach those assets caution on approaching us.
Which will force a change in tempo to the fight, one advantageous to us since itll make the Druchii fear attempting to get in close in the absence of sufficient screening elements to safeguard their lives.
All of these are good things for us.