4/5 stars. The rules are rather good.
Background.
Despite the popular opinion that the Kratos was only introduced in second edition, the reality is that it has been mentioned in the lore for a lot longer. It is a line breaker tank of ancient Terran origin. Slow moving, but highly effective, the legions swerved away from it as they favoured faster deployments, but it never lost its edge and was rapidly pressed back into large scale service thanks to the Heresy.
Strengths.
With AV=14 all around and 10 hull points, this is already a tank to be reckoned with alongside the more classic land raiders. There's a choice of 3 main weapon variants.
The Kratos battlecannon can fire HE shells to give S=8 and a large pie plate with stun, or AP shells with AP=2 and armourbane. One shot either way, but one is a mechanicum killer, the other takes out tanks. Flashburn shells is an upgrade for a small cost to give armour bane at S=9 and AP2 with 3 damage (all types of shots have D on ordnance making them quite strong). Nothing quite like 4 damage at S=9, so this is strongly rated, even with overload.
The Volkite Cardanelle is interesting for its vast range 12 shots at S=7 and 2 damage even if the AP is poor. Deflagrate and suppressive only add to this. A real infantry stopper (including terminators).
The Melta Blast Gun supplies 2 shots at S=9 with melta at a reasonable range of 24. AP is 2 and damage is a straight up 4 with heavy on the RS. This is a real impressive tank killer.
Sponsons come recommended with lascannons and volkite culverins. The front mounted heavy bolt guns can also be swapped out, but the points costs stack up fast in doing so. Dozer blade if you need to move closer and hunter killer missile to taste.
Weaknesses.
Slow moving.
Builds.
Kratos with Battle Cannon, Flash Burn Shells, Mounted Autocannons (300 points).
Plenty of dakka! Dozer Blade to taste.
Kratos with Volkite Cardanelle, Volkite Culverin Sponsons, Mounted Volkite Calivers (295 points).
You should know the rule about volkite by now: go big!!
Dozer blade to taste.
Kratos with Melta Blast Gun, Las Cannon Sponsons, Mounted Las Cannons (355 points).
When you really, really need to kill some armour and you don't have other choices, and don't mind all your eggs in one giant proverbial basket that acts as an incoming firepower magnet. Very expensive, and possibly should have been a Lords of War (source: me).

