Kalran: Tales of the four nations/Steelclad

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Tactical analysis

 * From the Depths: A massive ballistic missile submarine, the Steelclad carries 6 superheavy rockets and void torpedoes. While it has no other weapon, the Steelclad possesses enough power to shape battles, and can do so from safety, thanks to the incredible range of its rockets and the fact submarines can only be targeted by dedicated weapons. It can dive deeper to avoid depth charges as well, though at the cost of being slowly crushed the immense water pressure
 * Boomer: The highly advanced rockets it carries comes with immense destructive capabilities. Upon impact, its powerful warhead creates a massive blackhole that pulls in and crushes anything unfortunate to be in the blast. When upgraded with Improved seals, these rockets can be launched underwater, unless the sub is diving too deep
 * Join the depths: The void torpedoes these subs also carries are extremely powerful, as it creates a blackhole that rips apart its unfortunate target upon impact, but they carry no internal guidance. This allows them to be fired underwater; but they cannot track targets, instead travelling in a straight line. They also lack the ability to distinguish friend from foe, and there are a few unfortunate cases where dwarven submarines or allied vessels were sunk because it accidentally crossed in front of one of these devastating projectiles
 * We don't have reserves: Chief among the Steelclad's weaknesses is that fact that it needs to return to base, or as close as they can to a munitions depot to rearm after it has launched all of its rockets and/or torpedoes. With a payload of only six rockets and four pairs of torpedoes, one should make sure to choose their targets with care. And the armor itself is rather thin, meaning that it only takes a few depth charges to sink them

Trivia

 * The Steelclad is based off the typhoon class submarine and the Object 941 from Dawn of the Tiberium Age, with its torpedoes based off the akula from red alert 3.