Terrified...

[Seku]

If you're going to take tanking seriously, I'd go GLA until you get Awareness after that play all 3 and choose which you want to play unless you're going for world / sever first in which case refer to WAR, as currently it has a 100% spot in someones raid group some where.

As for what is easiest. After sitting back and having played each job over again through low level dungeons, I'd have to say it's actually MRD. A lot of people are saying GLA due to it's ability to just throw up a defensive CD and that's it because you don't have to think about, but really MRD does close enough to the same thing but has less defense, however it has the ability to do a lot more damage in comparison to GLA. The biggest issue being that you've got to learn to control your TP and watch it as it's a resource that you cannot recover with MRD alone. Later in the post I'll go over with how to get around this some what.

The only thing you really get from GLA at early levels is basically a stun you can spam (because a monster just sitting there is a monster not doing damage) and rampart (-20% damage to ALL attacks) with access to Foresight. Aka GLA edges out in defense, which is basically useless from 1-30 since even a DPS can tank through all dungeons with a healers aid. The 2nd is that it can naturally recover it's resource (mp) on it's own.

With MRD you have less Defense options, but will have a easier time holding hate (which I personally think is more important) and if you catch on fast enough on how your abilities work with each other you can actually start speed running things and do it fast by pumping out damage yourself with Over power while still maintaining your defense in most cases, something that GLA simply cannot do due to the lack of AoE damage.

If you've got the time though or if you already have the job(s) level up more power to you. But the following abilities I find to be super helpful for MRD that do not come from PUG or GLA, btw if you're taking WAR serious defiantly get all the cross class abilities from PUG and GLA.

Abilities and what they use for are as follows:

Invigorate - LNC 22 - Say hello to OP spam.
Raging strikes - Arc 4 - Free damage boost at no cost.
Blood 4 Blood - LNC 34 - Some will disagree with me on this one. But if you've got a healer that is good at spamming cures and doesn't go into DPS or if you pair with Blood bath, maim, and Foresight to help regain some of the defense lost your Over Power spam will be a lot stronger, things die faster. With things going down faster you take less damage.

The whole concept behind this is to basically pump out DPS while tanking. On trash mobs you'll be able to spam Over power with a bit more ease, when you fall down to 600 tp or lower use Invigorate.

Raging Strikes should be your first damage booster before B4B, paired with Main you'll be doing a decent chuck both single target and multi-target

Blood for blood, Use this ONLY when you know one of the following. 1. Your healer cure spams for no reason what so ever. You've only lost 50 hp and they cure you. 2. You've got it ready to be paired with Blood bath and another Defensive cool down (Forsight or convo from GLA). Or 3. You just have a good healer that knows how to deal with it. --- Use this only when you're sure about what you're doing as it requires a bit of insight of each independent situation.

@ 30 however you'll be introduce to your tanking stance and will lose access to the previous mentioned cross class abilities due to being able to become WAR. The only thing is that invigorate may spoil you and you'll have to learn to work w/o it until you get Equilibrium.

Finally, if you just want to play WAR normally, same as GLA, you can easily just spam Over Power 1-3 times while in STR accessories and keep foresight up. Just get GLA up to level 8? I think it is and get flash as it'll help with TP issues and is generally easier to pull with while running through groups.

Hoped that helped.