Project Summary: We decided that removing the wall was the best idea. We'll need to hire a construction team who can destroy the wall and clean up the debris. The only downside to this is the time it takes to get done and the cost of hiring the construction team to get the job done.
If this fails our plan is to fence off the top of the wall so that it doesn't allow people (Or large, unholy egg creatures) to access the top. This plan will take less time and cost less, but it wall also be less effective, allowing him a chance to still get onto the top of the wall.