Though it's probably bad for originality to use D&D and Lobotomy Corporation as basis for my world, I doubt there'd be any left of the former by the time I'm done with it.
Things like instantaneous teleportation and dimensional doors go right out the window, of course. However, there are two spells I kinda want to have, though I've tweaked them as well.
Call Cleaners (formerly Planar Ally): Call up to four "Cleaners" to aid you for a price. These are Carmen (White Cleaner), Kali (Red Cleaner), Clef (Pale Cleaner), and The Dark Cleaner. They are sort of human, except for Kali who is a full-body cyborg, complete with personalities and memories of past jobs.
Rabbit Protocol: Yes, it's from Lobotomy Corporation. I think this video demonstrates what it is about. Basically, up to 32 heavily armed soldiers appear seemingly out of thin air and blast your enemies into pieces with their assault rifles. Unless it's WhiteNight.
The problem with conjuring is obviously moving things to places quickly without getting shot down. Things like Call Lighting or Storm of Vengeance can be easily replaced with airstrikes, turning the session into a turn-based CoD: Modern Warfare. Not as bad as it sounds.
However, I have no idea how Cleaners or Rabbits could actually get almost always from point A to point B in time without bending space-time, something that even if possible, would take a literal Moon (in weight) to accomplish. Sure, it requires you to be out in the open for the spells to work blazing fast, and deployment time is doubled for buildings and underground places, but it's still fast.
Things like Deep Strike would only work for Kali, as she and Space Mahreens from WH40k are the only things that can survive being shot at the enemy from the orbit.
So, how could conjured troops get to their target so quickly that it almost looks like teleportation, if still want my world to be compliant with the rules of physics?