Mob count- Too low? :(

I know there might be a good reason to have like 1 mob spawn per fm, but as I was rb i found a little difficulty because some mobs wouldn't spawn and I would have to wait around and stuff. It'd be nice maybe if like in a fm for example 5 had like 5~10 Paps spawn instead of 1 per. or maybe in one of the rooms have a bunch of headless horsemen. I'm a kind of guy that likes trainning and such, so I thought that this suggestion can be helpful

TL;DR more mobs spawn in FMs and mobs that are bit easier such as headless horsemen might be nice too.
Thank you!

There is a reason why we dropped to 2000x exp.