Wardens are a powerful, self sustaining class able to function in a variety of roles within a fellowship or soloing. Wardens use a variety of weapons, but specialize in spears. They are excellent combatants, especially good at ambush and single opponents.The BasicsThe warden is a great class, able to adjust how they play based upon what their needs are. For example, a warden can be in a fellowship and act as a tank, or a damage dealer, or self-heal if needed too. In addition, the warden has access to both light and common damage, able to affect differing enemies as needed. In combat the warden’s powers are very flashy with some of the best animations I have seen in the game.
Outside of combat, Wardens have some of the traits of hunters. They have personal fast movement; allowing instant travel, plus they have a short term stealth ability, and a toggled fast movement ability.
A Look at GambitsThe most important function of a warden is their gambit system. Warden's function in most ways as a medium armored tank who has good ranged and melee abilities, and good blocking, evading and parrying abilities, plus toggled stances for offense or tanking, similar (but not the same) as those of a Guardian.
However, using gambits they can customize the damage to opponents, choosing special attacks which increase their aggression, how they do damage (direct or damage over time), absorb threat from other fellowship members, heal themselves, or occasionally stun or daze opponents.
The warden has a spear attack, fist attack, and shield attack. These are basic attacks that do a small amount of damage, plus add a (as appropriate) fist, spear or shield icon to the warden’s gambit panel. Gambit icons stack up, like a hand of cards in poker, to mean different things. All gambits are triggered by the same button, which changes appearances as you stack up a better or better gambit.
For example, a single shield icon in the first gambit position, followed by a single spear icon in the second gambit position, will allow use of “The Boot” gambit. “The Boot” does some damage and has a small chance of dazing an opponent. A warden can instead choose not to trigger this gambit, but instead add another, third icon by using a fist, spear or shield attack, and instead use a new 3 icon gambit, formed of shield/spear and a third button. A fourth icon on top of that one would bring a whole new icon to use, and so on.
You can form gambits formed of up to 5 icons. You gain access to gambits which use larger and larger numbers of icons as you level, up to 5 icon gambits at highest levels. In addition, you gain better and better gambits as you advance, too.
Combat with a Warden is a lot of fun, because aside from a suite of useful combat type powers, you also pick the order of attacks to set up certain gambits as you fight, tailoring it to your opponents.
Information taken from TenTonHammer