Add monster building rules

[sixfold-origami]

Blocked on #18

• Essence scaling for monsters?
• Monsters are currently behind the power scale because they don't have class abilities
  • Fewer affixes
  • No tactics abilities
  • This gets worse as tier increases
• Need to be able to scale monster power without increasing their complexity. Monsters should generally have fewer affixes than players.

[sixfold-origami]

From the newly resolved attrition changes (#22)

• Default balance should be 50/50 players vs monsters
  • Worldspeakers are allowed (and encouraged) to have tier-1 and tier+1 fights to keep things interesting
    • This should probably come emergently from danger levels
    • Although you could easily do OSR/Z1 style
  • Players should have information on approximate difficult of fight before starting

[pagnabros]

I think that could be achieved by making monster being a little stronger maths-wise on statics numbers, while also having less active abilities. I will try to find a good balance between complexity, power and boredom

[alice-i-cecile]

This is much simpler due to flattened player power curves.

[sixfold-origami]

Sixfold's proposal, general plan:

• Tweak numbers
• Spell card system for big setpiece abilities that can only be used once
• Revisit power building rules - clean these up a bit
• Passive powers should be allowed (ex: beat of death)
• Monsters should gain a few feats, but fewer powers (1-2 + spell card)
• Have a monstrous feat list
• Custom, unique powers/feats should also be allowed, but this should be largely reserved for the hacking guide
• Look into Marco's fun table events idea thing