I want to create a level one fighter orc as chief of orcs for a 1st level party of 3. Should I roll stats and give the orc +4 Strength, –2 Intelligence, –2 Wisdom, –2 Charisma as you would for a orc character, and if so what would be the CR of this monster. Or, should I give it +4, +4, +2, +2, +0, -2 as stated in the bestiary for adding levels to monsters, and what would be the CR? I'm trying to create a CR3 So I figured a level one fighter orc as chief and a couple of body guards would suffice.
Or, should I just make it an advanced creature?