Anti-Party Balancing (minor SoV spoilers)

[Etob]

Spoilers:

I'm currently running WotR for a group of four, and we've just begun SoV (cleared the Gibbering Swarm last session). After consulting the players, I've decided to replace several minor bosses (Barrid, Jestak, etc.) with an anti-party of my own design. My problem is balancing them, especially in the face of mythic PCs. Given the party below, what level and/or tier should the antis be at? What about at higher levels? (1 encounter per module, alternating solo fights and all at once). I've got the antis pretty much built, with each being an evil version of one PC, and a direct counter to another. They're currently built at level 10, with no tiers. Any other general suggestions are welcome, and more information can be provided upon request.

The party:

Zaigan, Emberkin Synthesist 7, Archmage/Hierophant 1

Varren, Human Two-Handed Fighter 7, Champion 1

Riddik, Human Cavalier 6, Chevalier 1, Marshal 1

Orion, Elf Alchemist 7, Trickster 1

The Anti-Party:

Dellisar, Tiefling Occultist (archetype) 10

Valmotha, Dhampir Antipaladin 10

Rotfoot, Goblin Gunslinger 11 (planned to have him show up later in the module)

Maldrek, Pitborn Primalist Metamagic Bloodrager 10

[Matt2VK]

I always think the one item that almost always get's forgotten is taking advantage of the terrain/environment. This can go a long way vs OP characters and helps you set the pace and flow of combat. With, maybe, avoiding the alpha strike so many characters are build around.

[Asmodeus' Advocate]

I kinda want to play Wrath of the Righteous at some point so I skipped past your post when I realized it had unmarked spoilers. Might I suggest posting this in the adventure path specific subforum?

[Etob]

Sure, sorry about that. Still relatively new to the forums, so I'll try to figure it out.

[Etob]

Can't find an AP subforum, but I did at least flag the post for spoilers.

[Asmodeus' Advocate]

I'll link you to it!

http://paizo.com/paizo/messageboards/paizoInc/pathfinder/adventurePath

Glad to help. Rereading my post, I realized I might have come across as somewhat abrasive. (Well, I am somewhat abrasive. But I do try not to be.) So I'd like to apologize for that. In any case, welcome to the forums! I hope to see you around.

[Etob]

Thank you kindly! Reposted in the WotR subforum.