Navlink invokers, performance and navlink proxy

Hi!

I am currently developing the AI for my game and my map is a pretty big landscape.
At the moment, I have added a navlink invoker to my enemy AI and I was wondering if anyone knows the performance of using this versus just adding a massive navmesh bound to my landscape that all of my enemies can make use of?

What if I want to have a group of enemies at the same location, would invokers overlap or do I have 1 enemy AI with the invoker and then my other AI can make use of those grids that the AI generate?

And then we navlink proxies for elevation, is it possible to somehow make these dynamic and let the AI check if they can or can’t jump up / down? Because I can’t imagine I need to add a proxy at each location where I have a change in elevation?