Go for Paladin if you start as a first time. Easiest to play and more sturdy from my point of view. Flash is good for AOE aggro. Yet if you get more skills like Rage of Halone, on multiple pack you could share some of the hit to each of them. Like this : if you play on PC like me, after flash you go fast blade then savage on one mob then hit tab to hit another with Rage of Halone then tab again to "Low Blow" another or restart that combo on a new mob, ect + add Flash on the middle. Still always keep your eyes on each mob to avoid any of them to go after you teammate, especially healer. Keep in mind that a tank, you go first on the battlefield but you are the last to leave it. Meaning secure your kills till the end.