The traditional answer to this is to just not let players cast spells that would be costly to implement, in the same way that we can’t currently cast Reincarnate or Magic Jar. There are still high level combat spells to look forward to, like Meteor Swarm.
It sounded like a mix of the rule set plus the insanity of some higher level spells making coding some things just not possible.
Just like tabletop!
The traditional answer to this is to just not let players cast spells that would be costly to implement, in the same way that we can’t currently cast Reincarnate or Magic Jar. There are still high level combat spells to look forward to, like Meteor Swarm.