Exemplum: Mordrak and Friends Explicated

I posted the following as a response to one of the comments and by the time I got done realized it was a mini-tactica. So here is that comment, blatantly plagiarized (can one plagiarize oneself?) as a post:

Tactical highlights for the Erudite Mordrak list:
-Mordrak and his termies form an old-school retinue (he can't be picked out in CC); plus halberd termies strike at I6
-Mordrak and his squad (incl. IC) have a special rule that allows them to deep strike on turn one without scattering
-Mordrak also has Grand Strategy (G/Strat) which allows up to D3 infantry units to have either Scout, Counter-attack, count as Troops, or re-roll all To Wound rolls of 1

So the simple strategy is to give at least the Purifiers the Scout USR (which conveys to their dedicated transport). If you manage to get a G/Strat roll of 2 or 3 then give the Grey Knight Strike Squad (GKSS - Troop choice) Scout with their rhino and the dreadnought Scout as well (all have to have the same G/Strat choice).

The librarian has two interesting powers in this strategy. Summoning allows him to deep strike an infantry unit to within 6" of him. Use the librarian's servo skulls to reduce scatter. The warp stabilisation field on a vehicle allows the vehicle to be summoned as well.

Shrouding is a power used in your opponents shooting phase and grants Stealth to any unit within 6" of the librarian (including vehicles). Strategic placement of vehicles via Scout and use of smoke should give your vehicles two rounds of 3+ cover saves.

So the librarian summons the land raider on turn two and either pops smoke or shoots the S7 assault cannon (it counts as moving Flat Out but with PoTMS can still shoot one gun). Meanwhile, the Purifier squad lays down covering fire with psycannons from the rhino, hopefully shielded behind the summoned raider. With luck and Stealth, you survive your opponents next round of shooting and on turn three deliver a heaping helping of terminators and purifiers into assault.

To me, this embodies the power of an elite, survivable army. You are banking on some cover saves, but Mordrak's termies should be in cover and Stealthed and 3+ cover on vehicles is as good as you can get in 40k right now. If you can weather the incoming fire, you have pretty much broken your opponents flank by turn three and should be able to roll right through.

Of course, this is all theoryhammer, but I feel like the new GK 'dex at least give you a reasonable chance of making this happen.