[Shovah32]

S9W9 is very nasty on vestals. With ethereal, twist fate, great defence and high mr they are very hard to kill. Their speed from w9 allows them to quickly approach the rear of the enemies army and their survivability lets them slowly grind the enemy down when they get there.

S9D9 could also work, not only does it provide you with access to high level spells such as the death globals, tartarians and master enslave(without communion or with it) but it lets them do alot of damage to SCs/expensive units without magic weapons/lots of attacks(ethereal, twist fate, very hard to banish and death weapons to stack afflictions).

LA pangaea is fun but, without building your whole strategy(or atleast most of it) towards massing undead it will only remain a fairly small part of your strategy.

LA ctis is slightly better for raising undead imo. They dont need any research to summon their undead priests and can use them well. They have fairly cheap death mages who can summon these reanimators and can cast the deadly battlefield spell banefire. When reanimating they can also get lizard undead who, iirc, are better in general than regular longdead.