This could be rather decisive in some battles and is worth keeping in mind. That said, we have the option of switching out the standard missiles for pure Hyperios air-defence missiles here (for free) to turn it in to an anti-air unit. But my concern about the tank remains the same: it is fundamentally anti-infantry. Much like the Warhammer 40,000 Whirlwind Tank analogue, this comes with both Vengeance and Castellan missiles in the whirlwind launcher, but the controlling player must select between them prior to firing. Again, it comes with a heavy bolter, but here it is much better matched in terms of range. This features the medusa siege gun which is more powerful than the earth shaker cannon, but at a much reduced range. With an earth shaker cannon (and heavy bolter, which I'll largely ignore!), the basilisk is certainly one of those big guns that the Iron Warriors would favour. The squadron can select from three different types of tanks.

On the contrary, they are certainly there for them to use if they wish. Yet that does not mean that they will be bereft of such tanks. Hence for these legions, this kind of squadron is going to be a great (and fluffy!) choice. That said, there are clearly legions that favour such heavy guns - the Iron Warriors and the Imperial Fists being chief amongst them. The reason for this is found in the background fluff: artillery is the domain of the Imperial Army and its static nature is not best suited to the Space Marine Legions. The Legion Artillery Tank Squadron is one of the few entries in the Heresy era army list that has a limit of 0-1 on it.

Best tank in legion