C'tis strategy

[Vorkosigan]

I've been experimenting with C'tis (base theme). After a number of false starts the lizards started to make sense to me. Here's the strategy I'm using. I'm going to be starting a MP game with a friend tonight, so comments are welcome.

C'TIS (base theme)

Pretender: Ghost King
Magic: 2F, 3A, 2W, 3E, 3S, 5D, 2N
Scales: 3 Order, 3 Sloth, 1 Heat, 2 Misfortune, 3 Magic
Dominion: 6
Castle: Watchtower
Pts left: 0

Research:
- Alt 3 (mistform, mirror image, ironskin, personal luck, quickness)
- Conj 1 (vinemen)
- Constr 2 (ivy crown, dwarven hammer)
- Constr 4 (winged shoes, wraithsword, skull staff, skull mentor, bag of wine, staff of storms, wallshaker, thistle mace)
- Enchant 3 (raise skeletons)
- Conj 2 (dark knowledge)
- Conj 3(vine ogres)
- Conj 7 (air queens in SP only)
- Conj 8 (well of misery)
- Conj 9 (ghost riders, tartarian gate)
- Constr 6 (skullface, moonvine bracelet, etc)
- Thaum 4 (gift of reason)

GK is used for early expansion and site searching, stopping at Constr 4 to build a DH and SoS. Several Shamans with ivy crowns are set to summon vinemen, and any Sauromancer with 2N gets a thistle mace + ivy crown and set to summon vine ogres.

Armies consist of Elite Warriors, Vinemen and Vine Ogres, backed by a Lizard King (with SoS) casting fanaticism and Sauromancers (with Skull Staff) casting Raise Skeletons.

At Conj 8, GK casts Well of Misery. At Conj 9, Sauromancers with 3D get Skull Staves for casting Ghost Riders. At Constr 6, GK builds a moonvine bracelet for a 2N Sauromancer, then gets a Skull Staff + Skullface and begins summoning Titans.

A question about Ghost Riders: say an enemy controls provinces A and B. The only retreat from B is to A. If I cast Ghost Riders on both A & B, is the army in B destroyed when it tries to retreat?