Hostile mob spawning rethink

[DylanGK]

All non-swarming hostile mobs would probably best spawn alone. This includes all spiders, but does not include wasps.

It is counterintuitive that predatory insects or arachnids would spawn in groups to me. I think this change would slightly improve gameplay while also opening up power budget to make each hostile mob truly unique.

I'd love to hear your thoughts.