Hallo so in a tekkit world i am making a zombie grinder with 100 spawners in it. It is not complete but i want to see if you guys think that this is pretty cool or not. The layout is very simple and i might make a video showing a tutorial.
I'd suggest putting blocks on top of the spawners and then the ceiling the next layer so the mobs don't get stuck on top, like Gap425 said.
Ehh depends in tekkit the spawner you can choose with too many items, and too many items in vannila minecraft you gotoo a folder and change it to what type you want but in a server you do /spawner themobtype.