I want to restart the game. Thing is I haven't played the game in 6 years and I want play this again. I want to play warrior and warrior only so I was wandering if this would be a good end game job.
Warrior is a fantastic DD, more than capable of being top DD in any event where melee damage is used. Trouble is nobody has only one 75 anymore, the ideal is to have at least 4, a DD, a support job, a healer and a tank. Most people go with 2-3 of those. As said before though your attitude will be far more important than whether you top a parse or not in an endgame linkshell, with a good positive attitude and some flexibility (i.e. 2-3 types of jobs leveled) you'll do just fine in any good shell.
I'll give a brief rundown of common stuff people do at 75, hope it helps. Merits/leveling:
WAR is top tier DD here without a doubt, some people in this game think if it's not SAM then it's second best. Ignore these people, they obviously don't parse and as a result don't really know what they're talking about. SAM often looks good in parties and can get more hate than it's overall damage deserves due to it's spike damage nature, giving people who don't parse the wrong impression. Sky:
You'll want to do this as WAR, many nice pieces come from sky and for most things war is a great DD. There are several fights however where you will be nothing more than a spectator. This can be a bit frustrating but it's not something a linkshell will refuse you for. Sea:
The opposite to sky, you can do some fights but mages seem to rule supreme in sea. The upside is there isn't really anything great for warrior in sea anyway, you can get a PCC -1 and a zerg axe, that's about it really. Dynamis/Einherjar:
WAR is superb in these, fantastic DD, great caller and nice mini tank for anything but the NM's. You can even tank the NM's if you have good support and can do enough damage. Einherjar has some nice things for WAR but if you never do Dynamis you won't be sorry, the gear in dyna for WAR is dreadful. Nyzul/Assault.
Hit and miss for Assault, depends on which one you do, you'll either excel as a DD when you can melee or not be able to do anything at all and therefor not get invited. The gear from Assaults is... OK at best, with the exception of Perdu voulge, the best Axe you can get barring lucky Augments on a Erlking's Kheten. Nyzul also helps towards getting a Perdu so all is not lost, WAR is fantastic in Nyzul and the gear is a little better than for other Assaults. You also get King's Justice from Nyzul which is a very nice weapon skill to have and worth getting. Nyzul will be better for you than other Assaults for sure and WAR is more than welcome on any run with a DD slot available. ZNM:
I'm not very experienced with ZNM to be honest but when I have done it it's always on BLM, these fight are often kited from what I've read so I'd say War isn't that great for ZNM, you'll want Aurum boots too, they're the best we can get currently. BCNM/ISNM/CoP/various BC fights:
This is where you'll really start to struggle with only having a physical DD. There are many fights you can do but far more you can't. As a result making money could be tricky for you from time to time (BCNM etc.. are great ways of making money) Worse than that though will be getting CoP done, at this late stage in the game you might get lucky and tag onto a group which will pretty much walk you through it. But, and it's a big but, if you don't then you'll have to /sh for groups etc.. and you'll have almost nothing to offer for some fights. You will want to complete CoP too, Rajas ring and Brutal earring are both peerless for warrior. HNM:
I've never joined a HNM ls so again my experience is limited in this, I understand that war is fine though. The problem you will have is getting a good shell that can actually claim and kill these creatures with only one 75. I'd say your chances of doing so are somewhere between remote and non-existant. Limbus:
For Farming chips there are few jobs that can match a WAR in limbus as it literally tears through those mobs. You can easily be top DD and tank at the same time in limbus, you even get the chance to use your 2 hour frequently thanks to restore chest for those awesome 2 hour'd weapon skills. My favourite event in this game is Limbus on WAR, I just can't get enough. For the Bosses though.... you'll either be badly nerfed or out right useless depending on what strategies are used for Omega, for Ultima you can melee but most shells I know of just blow it up with BLM's meaning no room for WAR.
tl:dr: When war is good it's fantastic but there are many events/strategies that simply don't use physical DD or don't straight tank stuff. For those fights you'll be a spectator so having job flexibility is important if you want to be able to do lots of different things.