Due to a possible error in the index, it is possible to create an incredibly shooty Autarch. The possible error in question is that the Deathspinner is not listed as a weapon you can only take one of.
It is also fairly cheap.
Combine this with a jetbike and the Autarch is flying around with 8 shots per turn at 12" range, hitting on 2's with rerolls, 4 shots S4 4 Shots S 6 AP -1, both improving their AP by -3 on a wound roll of 6.
That is dead shooty for a single model!