Going to main a tank job for SB need some advice

[konpachizaraki]

I would try them all before you decide. I play all three and IMO

PLD- the most easiest and safest to tank with and high survivability, horrible DPS though, but that will change in Stormblood thankfully. If you value protecting your allies more than anything else then this is your job

by the time stormblood kicks in PLD will be DPSing as good as WAR while also having stronger defense than both DRK and WAR