Editing Age of Darkness-Warhammer 30k/2.0 Tactics/Imperialis Militia (section)

===Solar Auxilia===

By default, they complement each other well. Lasrifles/Veletaris have the sheer firepower that your Infantry lack, while the widespread access Solar Auxilia have to tanks is helpful because your Russes don't come in squadrons and you really need the AP2 firepower. In return, Militia have things like snipers, Cavalry and Sentinels, which the more uniformly equipped Auxilia simply do not have. 

*It's worth considering skipping Cohort Doctrines altogether and just taking a Tactical Command Tercio. The Auxilia army is already pretty strong without them, and with the shortage of special weapons and AP 1/2 in general in Imperialis Militia lists you really want to say yes to 3 Plasma/Melta squads.
*Auxilia have Augury Scanners and tons of firepower, so they're pretty good at destroying enemy Deep Striking/Flanking units on '''Interceptor'''. Militia don't get Augury Scanners, so take some Auxilia to make up for that
*Taking an Auxilia detachment allows you to more or less ignore '''Industrial Stronghold''' off the bat, as the one Armoured Tercio you can take in your Heavy Support slot is really 9 Russes, which is more than you should need. Unless you really want that Valdor, take another Provenance that helps the rest of your army instead. Even then, consider taking '''Armoured Fist Pattern''' to take Solar Auxilia Russes instead of using a Provenance.
**Speaking of which, the Valdor has ''Shock Pulse'', which is a pretty good way of preventing enemy Blast/Template weapons from destroying entire units of your infantry every turn. That said, you only get 1, so it's arguable you should have just taken an Armoured Tercio with enough firepower to destroy the intended target outright.
*As Sentinels are technically Infantry, you can use Aevos Jovan to respawn them. No, we don't know how the Solar Auxilia's resident Dr. Frankenstein can repair an armoured walker with space surgery, [[Grimdark|nor do we really want to find out.]] Either way, it's a way of allowing your (very beefy) heavy weapons platforms to cheat death. With each Lascannon/Multi-melta Sentinel costing 75 points, Aevos Jovan will have paid for himself if he repairs even just 1, and unless the enemy routs the Sentinel squadron in one turn/melees them you will very likely get more than 1. Of course, this doesn't work if you're '''Distrusted Allies''', so choose Provenances/Cohort Doctrines carefully.

There are also some stronger combinations when you consider Cohort Doctrines/Provenances of War.

*'''Armoury of Old Night''' is as always an excellent choice, being able to mesh well with all of the Cohort Doctrines except maybe '''Solar/Penal Pattern'''. '''Ultramar/Reborn Cohorts''' with their massed Lasrifles benefit from the close-range firepower and ''Pinning'' of Assault Needlers, Cohort Doctrines allowing for Russ/Rapier/Automata spam will appreciate ''Pinning'' just as much as massed Lasrifle sections would, while '''Penal/Feral''' Cohorts can benefit from denying Reactions through ''Pinning'' too. On the other hand, spamming Volkites with massed Veletaris becomes less appealing when you have more firepower for cheaper at longer range with Assault Needler Grenadiers, as is taking short ranged weapons with '''Penal Pattern'''. Even then, short-ranged units that don't like melee benefit from ''Pinning'' even more than long-ranged units, notwithstanding their overlap with Assault Needlers.
*Remember that '''Solar Pattern''' has no downside when taken as an allied detachment, and in practical terms neither does '''Reborn Cohort''', as you only had 1 Heavy Support slot to begin with. If you're fretting over the very obvious limitations of the other Cohort Doctrines, think about taking these. 
**'''Solar Pattern''' allows you to skip taking Infantry/Levy/Grenadiers by replacing everything they do with Lasrifle or Veletaris Tercios, so you can pour your points into some of the more exotic choices in the Militia list (sniper Recon squads, Sentinels, etc.) while still being able to take an entire Tercio of Russes to cover for the Militia detachment's lack thereof. That said, this implies you want to take objectives with Auxilia infantry, so avoid Provenances that make them '''Distrusted Allies'''.
*'''Penal Pattern''' is an interesting choice that blurs the line between Auxilia and Militia by letting you turning Lasrifle sections into essentially discount Grenadiers, except with Solar Auxilia's Tercio and Vox mechanics. In this sense, it's a lot like a cheaper version of '''Solar Pattern''' in that it enables you to take more of the Militia list's more exotic units and Provenances to buff them, while still having good (by Militia standards anyway) infantry. Conversely, don't take it if you're taking Provenances that make your Troops better at range, particularly if you're going to take lots of Grenadiers. Same proviso for Provenances and '''Distrusted Allies''' applies as for '''Solar Pattern''', as you want your Lasrifle sections to take objectives.
*'''Armoured Fist/Siege/Iron Pattern Cohort''' are excellent ways of bringing big tough platforms of heavy firepower so sorely lacking in the Militia list, by spamming Russes/Automata. That said, don't think about taking '''Kinfolk Helots''' and repairing Auxilia vehicles; '''Distrusted Allies''', remember?
*'''Feral Warriors''' is an interesting choice, as you can take Cavalry/Ogryns (or even simple chainaxe Troops) to countercharge the Lasrifle gunline that is the Auxilia detachment. As always however, try to make sure before you charge in that the enemy can't kill 2/3 of your unit on Overwatch. Pin them, or charge units already engaged with your units; say, with the Lasrifle sections your opponent was trying to shut up to begin with, who refuse to break (unlike your flimsy Levies and Infantry) because they're testing on Ld9/10 from Vox Interlock shenanigans. The same applies to other melee Provenances.
*Don't be so worried about certain Provenances and/or Feral Pattern Cohorts making you '''Distrusted Allies'''. As mentioned under the Legiones Astartes section, Imperialis Militia can field so many units of ''Line'' infantry you really don't need more from Solar Auxilia, while their Ld buffs (Cohorts Vexilla, Command Vox) don't carry over to other armies regardless of position on the Allies chart. Even if (for argument's sake) you're spamming '''Kinfolk Helot''' Fire Support Squads to claim +1T on your multi-wound models, you still have 2 Compulsory Troops slots you can fill with 6 ''Line'' Infantry squads. And if you don't do that... that's on you for refusing to take ''Line'' units, isn't it?
**'''Feral Pattern''' can help a lot with your wide selection of ''Concussive/Pinning'' weapons with widespread ''Fear (1)''. Particularly good with '''Armoury of Old Night''', but also useful with melee builds (where you want ''Concussive'') or to help snipers/Kalliope Mortars. However, you have to be within 12" to make use of ''Fear (1)'', so your Auxilia infantry are forced to charge. To mitigate that and prevent your units from suiciding into that Pinned 20-man Despoiler Squad, place them at 11" or 12" where the charge will likely fail. The resultant Surge move will move you closer to the enemy unit, but that doesn't matter if it's ''Pinned''; if it isn't ''Pinned'', you were going to lose your unit when it gets charged next turn anyway, so again it doesn't matter. Alternatively, use melee units that actually want to charge, like Storm Axe Veletaris.