Secondary professions for an Assassin

Assassins are highly aggressive, focused damage dealers, better for hit and run skirmishes than drawn out tanking or back-line sieges.

Always remember, when choosing secondary skills, that native skills often have better synergy with the profession's purpose, interact better with the profession's other skills, and benefit from runes.

Assassin/Warrior

 * Assassins do not have any non-Elite attack speed enhancing skills (Excluding the PvE/Nightfall-only Critical Agility). Flurry, and Tiger Stance can increase the rate they can pull off an attack chain, as well as increase their overall DPS.
 * Wild Blow to cancel important stances.

Assassin/Ranger

 * Barrage damage can be improved with high critical strikes attributes, adding bonus damage to attacks, energy management, and effects from skills like Critical Eye, if you use Barrage with Sharpen Daggers, you can also spread bleeding.
 * Disrupting Accuracy in combination with high critical strikes and skills like Way of the Master and/or Critical Eye make nearly every shot an interrupt. Combine with IAS for even greater brutality.  Keen Arrow also synergizes with the assassin's high crit rate well.

Assassin/Monk

 * Monk skills have no specific synergy with Assassins, see the Monk entries in the for all professions and for melee professions sections of general secondary professions for more general information on Monk as a secondary profession.
 * Restful Breeze is used in some Assassin builds to recover health without spreading attribute points into Healing Prayers.

Assassin/Necromancer

 * Plague Touch is a good skill to rid yourself of conditions.
 * Many Curses hexes work to help you start chains with "Black attacks" and increase damage.
 * A Virulence / Necrosis combo works well with condition attacks, but one is an elite and the other is PvE/Nightfall only skill.

Assassin/Mesmer

 * Arcane Echo can be used to chain Shadow Form when running or soloing.

Assassin/Elementalist

 * Shock can knock down foes quickly, which combines well with skills such as Falling Spider.
 * Conjures can be used to trigger "Golden attacks"
 * Glyph of Swiftness can be used to reduce the recharge of Shadow Form to an infinitely manageable skill.

Assassin/Ritualist

 * Weapon spells (such as Warmonger's Weapon) can aid an Assassin in battle and are immune to disenchantment.

Assassin/Paragon

 * A spear-wielding Assassin with a high critical strikes attribute and skills such as Way of the Master and Critical Eye will be able to deal substantial damage, due to a spear's fairly high maximum damage and Vicious Attack.
 * Even with no points in Command, "Go for the Eyes!" provides a significantly higher chance to land a critical strike.

Assassin/Dervish

 * Critical Strikes used in conjunction with a scythe can create massive critical hits.
 * Some Dervish enchantments can help the Assassin survive longer in battle, or increase damage output.