I would suspect that /Cor falls behind /War and /Sam when they gain some more of their key abilities. Lvl 50 for Drg/War for Double Attack/Berserk and lvl 60 for Drg/Sam for Meditate/Hasso/TE.
Too, as you get into the lvl 50-60 range, many jobs will gain gear that they
SHOULD have. Hauby, +acc rings, Viking Axe, and other +acc gear. For the one handed jobs, there is Sushi to eat and I wouldn't worry about them too much. For the two handed jobs, hopefully their accuracy should be fine, but I could see them needing a mild +acc boost.
For Drg/War:
By lvl 60 you will most likely be using a GKL, have two +acc traits, and a messload of +acc. The +acc roll will not be beneficial to you (much), nor do I think will it be beneficial to party members due to food, abiliities, and absorb spells (which yes those Drks should be using)
I haven't used one so I don't know, but assuming the Dark Mezraq has the same -20 Eva added effect, and the same activation rate as the Mezraq/Thasowhatever, I'd think that this might be a better, if more unreliable alternative than a +acc roll from /Cor.
For Chaos Roll, I think I'd equate this with Berserk simply because you can have it up 24/7. I think that this might be more usefull than the +acc roll, however I question it's usefullness more from the standpoint, is it worth giving up a 10% DA rate when the mob should have Dia II/III and Acid Bolts on the mob for a roughly +9% attack boost?
I just don't know on that question, especially when Haste is tossed in. I think that this is a grey area. Also, I don't know how well a +9% attack boost would equate with taking 25% of your defense and adding it to your attack would be at later levels. Both your Attack and Defense stats are growing, and I just don't know which would be the better option for you and at what point the clear winner would be.
Situationally, I think Drg/Cor would be great on Imps since you only have one roll to work with. I had a hard time using my job abilities effectively (like Jumps, Meditate, SE+TE, Berserk) like I would have liked to, so having a long lasting AoE buff for the party is greatly appealing to me.
I'll have to touch on Drg/Sam later, but briefly, I prefer to save my Jumps and Meditate for SCing, so typically I'll use them after I WS so that I'm ready to SC with someone else. It would be my opinion that spitting out so many SCs and giving the mages a chance to MB if they so choose, plus added wyvern breath attacks, outweigh the benefits of the AoE buffs.
So in summary:
Low level stuff and against Imps I think this has promise.
I question it's usefullness at 60+ on anything that is non-Imp and doesn't have Amnesia.
As almost always, I agree with Lmnop
