Editing Warhammer 40,000/7th Edition Tactics/Inquisition (section)

===Battle Brothers===

* '''Imperial Guard:''' Probably the best bet for an ally, both in practice and in a fluffy list. You can take the specialized weapons that they can't, and provide nice fire support with a good shooty unit that's loaded to the gills with Marine killin' weapons. Alternatively, you could kit out an Ordo Malleus for melee, and Deep Strike him in with Tempestus. Deliver that Nemesis hammer to the face. 
** '''Militarum Tempestus:''' Like allying with Dark Eldar (Thankfully without one eye open), they're squishy on their own but very fast with their own Valkyries. They don't get the big guns or numbers of the Imperial Guard, but you can bring the big guns with the Conversion Beamer, Razorbacks, Land Raiders and Jokaero. Team up with Sisters of Battle also and you're back in 2nd Edition with Witchhunters, baby! Also, they are the reason you don't want to give your acolytes all the good shit: they get WS3+/'''BS4''' and are pretty much better than your Acolytes at everything.
* '''Space Marines:''' Blobs of Acolytes are your best bet with Space Marines- you give them some extra strength in numbers while they give you some extra bulk and deal with the tougher enemies that you're not suited to fighting yourself (e.g. MCs, named ICs). A good choice as an ally to support. Now the Vanilla chapters got Divination back on their Librarians. Still, get those cheap as chips warp charges in their army!
* '''Sisters of Battle:''' An interesting blend here. You get a ton of anti-infantry with Sisters and ways to get around Cover saves without giving up your precious Prescience. With Immospam back in full force, it could be a very neat combo, giving the Sisters the psyker support they need and some extra long range firepower outside of the (admittedly amazing) Exorcist. Coteaz in a 20 girl block of sisters is hilarious just from the amount of now guided bolter fire, not to mention the torrent of unhappiness that awaits any unit foolish enough to deep strike within "I've Been Expecting You" range. You can also add some Valkyries in (since they have no flyers on their own). Plus Sisters used to be teamed up with Inquisition, time for a reunion.
* '''Blood Angels:''' Your fire support is pretty good. Though you may find your Inquisitorial Henchmen overlapping with how versatile that Blood Angels units can be.
* '''Dark Angels:''' Servo skulls reduce friendly Deep Strike scatter and deploy pre-game, so value is found with Deathwing Deep Strike armies, alongside giving them continued Prescience when Deep Striking. Otherwise, mostly same advantages as per regular SM. Dark Angels can add some speed to your lists as well, though, with bikers. Also, they don't have any cheap Transport Air Units. Supplement this with those Valkyries!
* '''Grey Knights:''' Apart from the Stormraven, GK don't have any air units- they'll be grateful if you bring along a Valkyrie or two. And because they lost most of their anti-armor options with the Codex split, a bunch of Acolytes with meltas, lascannons, and whatnot is exactly what they need to stay in the game.
* '''Space Wolves:''' Valkyries (ironic for space vikings) are very affordable fliers for Space Wolves, though it lacks the utter cheese of Helfrost. Make sure you kit the buggers out with Lascannons. It also helps to add another cheap source of Psyker onto the field, freeing up for either another Wolf Lord/Character or give the Rune Priest space to roll for more helpful powers. 55 points(10 points. Thanks to the update you can now throw mega cheap psykers into the fight) for a Prescience on your Long Fangs on either side of the field? Sign me up. (Coteaz and long fangs also a pretty great combo).
*'''Imperial Knights:''' Never a bad addition. A big, scary distraction spewing death up the battlefield. If this is the main detachment, Prescience on these big guys is epic. With the new Codex, the Knight Crusader with its impressive amounts of Dakka is a great bet, next to the Knight Errant's long range Anti-tank.
*'''Skitarii:''' What do you give them? A HQ thats not going to die to a stiff breeze and what do you get in return? Reliable Anti air and cheap medium infantry. Pair up your Ordo Xenos Inquisitor with a squad of vanguard give him rad grenades and laugh in glee as you cause instant death on any MEQ thats dumb enough to get into combat with you. Bring a small squad of psykers to buff rangers with prescience, you also bring transports which is what the skitarii need most.
*'''Deathwatch:''' They play similarly to Grey Knights, low model count with 1 troop carrying flyer and they rely on deep striking, fast hitting assaults. Use Mystics and Servo-skulls to help with their formations. On the other hand, Inquisition brings the Deathwatch the warm bodies they need with Acolytes in dirt cheap Chimeras.
**'''Alternate Opinion''': Deathwatch squads are swiss army knives, the Inquisition can make them even better at their job. Throw an Ordo Xeno Inquisitor with the Plasma Syphon and the Liber Heresius/Tome of Vethric into a Kill Team to really ruin an alien's day. Plus, servo-skulls are perfect for the Black Spear Strike Force.