Initiative rework

All creatures have an initiative of 10
Modify initiative by dexterity modifier

Increase initiative by 1 if:
Weapon is Light
Weapon is Simple
No Shield in Off Hand
Armor is Light
Armor is Mythril
Using Natural Weapons
Size Small

Modify initiative by 0 if:
Weapon is Martial
Shield in Off Hand
Armor is Medium
Size Medium

Reduce Initiative by 1 if:
Weapon is Heavy
Weapon is two-handed
Weapon in Off Hand
Armor is Heavy
Size is greater than Large
Character has a wounded leg
Size Large or larger

If your passive perception is higher than the current initiative, increase your initiative by 1.