Hi with having the Twilight Forest disabled. I thought it would be nice to maybe add in a recipe for making a Ur-Ghast(the mini one, not sure of it's name). Being that I would think it would one be a lot easier on the people playing on your servers to spawn that in over a ghast what is super big and I would guess more laggy to spawn in. And being I have seen you guys add min a few items from the Twilight Forest and what not that why not try and get this in there too.
Spawning in different sized mobs doesnt affect lag in any way, its how many mobs are being loaded at once is the issue. So spawning in a tiny ghast instead of a normal ghast does nothing
As long as it is in the packs, we can not forget about it. There are a lot of decorative blocks, as well as some useful blocks in the mod, so I don't see that as an option. As for the spawning of ur-ghasts, as Benny said, the size of the mob doesnt really matter. But I also don't really see harm in adding it, either. Maybe add a poll to see what other users think?