Ahh, glad you started this again, really want to see it become a true mountainhome.
'operation street sweep of magma'
This is going to be like Boatmurded's operation fuck the world, isn't it.
If so, MAKE THAT A TOP PRIORITY.
Actually its going to be more complicated and less destructive, if it works correctly...
The plan is to make all the exterior streets and what have you that are prone to covering in wreckage and ruin, flood with magma to get rid of all the detritus...
But leave the farmland, pastures and even the exterior to the city walls intact.
Now if it breaks hilariously and produces !!!FUN!!! that is what my ground level aquifer is for!
And of course lets not forget that magma street sweeping may very well work for Sieges as well.
But I haven't even gotten more then 1 z level below my 'ground' level...
And that was so I had more room to build catacombs!
Still filling those up at a prodigious pace, In the hope of stemming the delay of bodies I have a corpse staging area now in the catacombs that should shorten the trip... and also gets my dorfs to use wheelbarrows for body collection rather then just dragging them around.
I might be forced to work out some minecart systems... if only so I have an easier distribution system of corpses!
I WILL FIND THE CORPSE OF THAT MURDEROUS GHOST AND INTER IT!