Editing Warhammer 40,000/8th Edition Tactics/Deathwatch (section)

==== Some general advice ====
While primaris look good on paper, they are still not exactly worth their points, unless you are hell-bent on playing a pure DW army. The codex greatly encourages getting your DW units right into your enemy's face, where you deal maximum damage with plasmas, meltas, frag cannons, and bolters. While your kill teams race towards the enemy in their Corvus Blackstars and Land Raiders, you need something that actually wants to sit back and can contribute efficiently to the fight. One of the biggest problems any DW player will face is that you won't have many units on the table at the beginning of the game. Thus, it's really easy for your opponent to focus fire on lone Corvus or a Raider, destroying it first turn and leaving your kill teams far away from the enemy and exposed. That is where Ad Mech and Guard comes in. Both factions have cheap troops that want to stay back (Skitarii snipers, Infantry Squads with heavy weapons), have excellent sources of long-range firepower that will ruin your opponents day if not dealt with (Cadian HWTs, Leman Russes, Basilisks, Onager Dune Crawlers). For example, for 670 points you can field 4 infantry squads, 2 company commanders, and 3 Leman Russ Battle Tanks. Use your Kill Teams as scalpels - eliminating key enemy threats while your allies deal with the rest of enemies army (Hammer of The Emperor Style). It's fluffy, looks cool, and is brutally efficient.