[Baalz]

I wonder how viable is would be to convert lizard kings to undead via life after death. B-line up to enchantment 7 as fast as you could - desert rangers and poison slingers along with poison ward and skellispam should be able to carry you that far fairly easily with no other research. Once there I could see really piling on the tomb wyrms using lizard kings, leaving your D gems for other uses (tomb chariot reanimators probably). This would also get you haste and if you've taken A on your pretender mass flight which sounds like a pretty nasty combo on 500 tomb chariots, along with power of the reborn king. This also nets you serpents blessing, which is just begging for you to figure out a way to find a couple foul vapors casters to pile on with rigor mortis.