Counter against Agartha's Marble Oracles?

[Kuritza]

They are magic beings and constructs, so elf bane axes, smashers etc are your friends here - equip some counter-thugs. (Bane lords, for example)
MR 16 is not that great; set up a (reverse) communion and spam control and opposition. In CBM control and opposition are also easier to cast/research, making contstructs much more vulnerable to mind-affecting astral spells than undead/demon thugs (which is ridiculous, but that's another story).
As a desperate measure, make some mr-penetrating items (spell focus, eye of the void), put these on your h3 priests (I believe MA Ermor has them) and just spam smite. Maybe set up a communion beforehand. I am not sure just how effective that may be, but if you send a BIG communion with penetrating trinkets, you have a chance to stop these Oracles. After all, they are rather expensive.