LearnESO (Great website check it out) build added here for easy reference although I suggest you check out the build guide on the website and video on Youtube.

Race can also be Nord (Tankier but harder sustain), Orc (better dmg but harder sustain), or even dark elf (not a fan but it is possible).

Keep Rally and Restoring focus up, during any fight you always want to keep these up because they are incredibly important for their buffs and healing.
Try to open with a power of the light then gap close on your enemy, use heroic slash to snare your enemy and reverberating bash to stun/reduce healing done. If you manage to get your enemy to lower health, its likely he will start healing when this happens make sure the reverberating bash health debuf stays up!! If an enemy casts vigor make sure to directly use reverberating bash.
Against nightblades keep the snares up (heroic slash) then biting jabs spam to prevent them from cloaking.
If you have debufs up on yourself use extended ritual to cleanse yourself and resolving vigor to heal yourself.

Werewolf works to bring down tankier opponents who you otherwise struggle against (they cant kill you either!)