Horus Heresy Review: Reaver Battle Titan

Many of the points I made about the Warhound Scout Titan are applicable here. Let me summarise the pertinent points:

(i) If you are taking titans, then your opponents might well be. You need to prepare for this through D class weapons.

(ii) Titans are not immobile weapons platforms. Move them to gain better lines of sight and to ensure any terminal explosion takes out enemy models and not your own.

(iii) Don't forget stomp attacks and tank shocks.

The principle difference here, however, is the option of a few different weapon systems and titan close combat weapons. These  latter items are 3 attacks as AP1 and D strength. Having one of these will certainly encourage you to move your titan and get inside the range of other titans weapons -- which can certainly be beneficial if they have minimum ranges.

Here are a few builds to consider.

Reaver Battle Titan with Apocalypse Launcher, Laser Blaster, Titan Close Combat Weapon
This is probably a base line Reaver. It contains a mix of D weapons, large blasts, and the close combat weapon to make sure you move the thing to take advantage of it.

Reaver Battle Titan with carapace-mounted vortex missile, 2 laser blasters
Very nasty turn 1 launch with the vortex missile to take out any close clumps of things you dislike, followed up by 6 D class shots.  And 6 more D class blast shots every turn thereafter. Nasty. Just nasty. Replace the vortex missile with a carapace mounted double-barrelled turbo laser destructor if you like, for sustained D shots every turn.

Reaver Battle Titan with carapace-mounted double-barrelled turbo laser destructor, 1 melta cannon, 1 volcano cannon.
Sit back. Blast away. Replace the volcano cannon with a laser baster to taste. But beware: this is one titan that you will forget to move around.