For a party of level 9s, here's the mix of encounters I'm using. My favorite is currently tactic #2.
1) Singular person encounter. These are usually the NPCs that can be reasoned with and talked to, but also pack Slay Living if the party isn't feeling diplomatic. A single-enemy encounter is also acceptable for enemies who don't think they're going to lose because they're quite ready.
2) 2 complementary NPCs (often identical statblocks -- saves time) of CR -2 from where I want them to be are typically more challenging than a single-creature encounter due to the increased tactical options available to you (inclusive of "buddy just got whacked, run away!"). This is currently my going favorite for power fights with non-head-honcho NPCs. When my Night Hag on a Retriever found herself on the floor because the retriever got dismissed, you bet she ran away... and she'll be back, too.
3) Save-forcing mook-pack (4-or-more). For example, Yuan-Ti ninja (the of the old-school Rokugan variety) are fabulous due to the sheer amount of poison that they can bring into a combat. They won't be wasting a prepped party of level 9's any time soon, but if they can get their poison attacks off -- chains, blowguns, bows, etc -- then that can weaken the party down enough to give the boss critters time to plan and counterstrike. (Additionally, stealing a page from Dune, you could give them a tooth with poison gas to use if they're not completely dead...)
Cheers,
::Kaze
1) Singular person encounter. These are usually the NPCs that can be reasoned with and talked to, but also pack Slay Living if the party isn't feeling diplomatic. A single-enemy encounter is also acceptable for enemies who don't think they're going to lose because they're quite ready.
2) 2 complementary NPCs (often identical statblocks -- saves time) of CR -2 from where I want them to be are typically more challenging than a single-creature encounter due to the increased tactical options available to you (inclusive of "buddy just got whacked, run away!"). This is currently my going favorite for power fights with non-head-honcho NPCs. When my Night Hag on a Retriever found herself on the floor because the retriever got dismissed, you bet she ran away... and she'll be back, too.
3) Save-forcing mook-pack (4-or-more). For example, Yuan-Ti ninja (the of the old-school Rokugan variety) are fabulous due to the sheer amount of poison that they can bring into a combat. They won't be wasting a prepped party of level 9's any time soon, but if they can get their poison attacks off -- chains, blowguns, bows, etc -- then that can weaken the party down enough to give the boss critters time to plan and counterstrike. (Additionally, stealing a page from Dune, you could give them a tooth with poison gas to use if they're not completely dead...)
Cheers,
::Kaze