Per @SalmonSnake's suggestions. Took a bit longer than expected, since I encountered a few more bugs that need fixing.

• Messages are now less likely to show double
• Clone spawn rate now matches what they are configured to (was far higher)
• Clones no longer drop items when killed naturally
• Added hunger drain option when going far enough. Off by default.
• Added regeneration disabling option when going far enough. Off by default.
• Added option to make special last resort options ignore experience level; or pay attention to it when mobs ignore it. By default, both pay attention to experience level.
  
• Added a maximum relative level. This applies to mobs and last resort options so be careful not to set it too low. Off by default.