Nuker

From Guild Wars Wiki

A Nuker is a type of build that rapidly uses a few high damage AoE spells. The build concept is closely associated with the elementalist profession. Hence, most players expect elementalists to be nukers, and it is advised to tell your team if you are not a nuker. Nukers often use echo chains.

Many spells are used for this, such as: Meteor Shower, Searing Heat (Teinai's Heat in Factions), Searing Flames, Fire Storm, Fireball, Smoldering Embers, and Rodgort's Invocation.

A serious problem the Nuker may run into is energy supply because of the high energy cost of some of the spells used (some can be as high as 25). To counter this, most Nukers will use Fire Attunement or Elemental Attunement which gives 30% and 50% of the base energy cost back to the caster of the spell has been cast. Using one (or preferably both, this is called dual attunement and it gives a caster almost unlimited energy) of these spells can give an elementalists a huge advantage in battle.

Another issue a nuker can run into is the high cast time of some of the spells. A commonly used solution to this is to use Glyph of Sacrifice. Though it will take an extra 30 seconds to recharge the move, by the time all of the nukers skills are cast whatever you will be fighting will be dead anyway.