Artillery: A by-word for big guns and big explosions. a word which conjures an image of dozens of high calibre cannons firing in unison to utterly obliterate their foe. But in Warhammer 40,000, what is the best way of utilising these units? How should you be using your Basilisks, Whirlwinds or Lobbas? Well, here's a few ideas which may help you.
Picking your target is essential for all units, including artillery. Look at the profile of your gun to figure out its best target. High strength guns will be great for tanks, whilst lower strength guns are best suited for infantry. Take note of any special rules. For example, the Whirlwind's 'hell-fire missiles' have the ability to ignore cover, so it's a great idea to use it to flush out enemy models and deny the weaker units their cover saves. Guns with a high chance of scattering (Barrage, low BS shooters etc) should probably aim for big groups, to maximise the chance of hitting.
More often then not, artillery units have good strength, AP, and a large blast, so your target should be whatever is the most threatening unit at the time. In most cases, flyers are out of the question, since you cannot target them with blast weapons under normal circumstances.
So remember, Stay back, get cover, and focus your shots.