I like some of your list but alot of seems to be skimping on the main tricks of an Altaioc force.
I understand the desire for a mobile Farseer but the Jet Bike Farseers just cost to much, and are prone for death from Perils. I would say use Eldrad, stick him in the back in range to hit two pathfinder squads with Fortune a turn, prefrerably with him in one of the two, but that can be hard, it also gives them better leadership for the target priority tests.
I personally would use slightly larger units lets say 8 to 10 of Pathfinders, I know it will restrict the number of targets you can shoot at simultaneously but it helps believe me.
So the list breaks down to roughly this.
Eldrad 210
Farseer with Fortune, Doom 130
3x8 squads of Pathfinders 576 (would have more but I guessed you only had 24)
1x5 Harlequins with Shadowseer all with Kiss.
2x6 Striking Scorpions with exarch, infiltrate, power claw 286 (great Countercharge)
3 x Vibro Cannons 150
All but the
HQ's, Harlies, and Vibrocannons infiltrate, you will then have the ability to redeploy 1d3+1 units, I would definately think using the Vibro-cannons to push back his forces if you go first on the deploy, and then hide them after he has been pushed back. The other nasty trick is that you can deploy normally with the Pathfinders/Scorpions and then turn around and infiltrate them before the game starts which can just give your opponent fits.
My biggest concern is that you won't have enough cover to hide behind and in, remember the Vibro-cannons draw lines and they will affect your units to.
P.S. remember you don't need
LOS to use Doom, so you can deploy a little ahead to catch a unit of his with it, then run away during movement, hell you can even fleet of foot. . .