Dreadnought's arms can be destroyed by focusing on using physical attacks as they automatically target them. Staggering the Dreadnought either by exploiting its weakness to ice during Wrecking Ball, or when its arms are destroyed, will result in encasing it in the ice.
The drop rate for Heat Blitz increases significantly by destroying the arms.
The easiest way to defeat Dreadnought is by bringing Ice elemental abilities like Blizzara and Froststrike. It is important to keep at a distance. The player can sever its arms via Froststrike. Afterwards the player should move away from it and use Blizzara. When it uses Wrecking Ball or Pulverize, the player should aim for a Perfect Block. Blizzard and the regular Attack can be useful.
The player can use Overclock to unleash ice and/or high-powered attacks onto the arm. If enough damage os dealt, the arm explodes and Dreadnought is temporarily stunned. After that, staggering it with ice attacks should be easy.
[view·edit·purge]Dreadnoughts were a type of battleship popular in the first half of the 20th century before the advent of the aircraft carrier made them obsolete. They were gigantic heavily armored ships noted for an "all-big-gun" design that allowed for great firing range while being well-protected. The term "dreadnought" comes from the first major ship of this design, the 1906 HMS Dreadnought. The word means "fear nothing".