I know this is the wrong thread (/NIN versus /WAR for merits), but since it got locked only a day prior, and this is still a thread technically about merits, I have to voice my opinion. Because frankly I don't think I've ever seen a greater collective group of misinformed and confused people (read: idiots) when it comes to SAM than here.
To clarify as to what he's saying in point A, casting time for Utsusemi is increased by 50% and then the recast time is increased by 50%. What this means is that not only are you waiting long to finish casting, you're also increasing the time until you can recast Utsusemi thus prolonging your vulnerability to getting attacked.
Point B is also true, mobs do die fast. If your WHM or RDM can't keep up then it's their fault. Just last night I was in a party with a BRD and WHM; this means a slower refresh effect than if it was a RDM, and yet they had absolutely zero problems keeping their MP above 900 even with me being a so called "MP sponge." If your healer is running out of MP, consider replacing the healer, not the SAM/WAR.
Point C: While Utsusemi is indeed a static three shadows, once those three shadows are up, it's over and you need to recast; but you can't because you get interrupted due to longer casting time, or you can't because the recast isn't up yet due to a 50% increase. Whereas on the other hand while Seigan+Third Eye is random and can last as few as one attack, or as many as over ten attacks, when the longer streaks of anticipates kick in, it's absolutely worth is every time. Not to mention Third Eye blocks the entirety of multi-hit attacks whereas Utsusemi does not.
This is a joke, right?
You gain more damage from /WAR due to increased attack and a higher base STR than /NIN. Not to mention you gain access to Berserk and Warcry; 10% Double Attack. Even with fulltime Hasso, a SAM/NIN's damage is going to fall short of the SAM/WAR with Seigan simply because of the support job.
Did you really just compare a MNK to a SAM? MNK has to sub NIN. Why? Because they don't have access to Seigan and Third Eye. SeiganEye is what allows SAM/WAR's to do what they do best. You said Third Eye is bad because it isn't consistent, and I agree on that part to an extent, it isn't consistent, but while Utsusemi is consistent, it's also consistently unreliable because it's guaranteed to only block three hits. Third Eye has the chance to block much more. I've seen Third Eye last the full 30-seconds duration and be under attack the entire time on several occasions.
Another thing I noticed in your posts; you're downing Aselus for using a Polearm? Last I checked Greater Colibri are weak to piercing, and I've seen SAMs throw out 1500-2000 Penta Thrusts on a regular basis. I know this because mine has.
Lol.
So, what you're saying is that whenever you get hate (which as a SAM is quite often), you should cancel out Hasso or Saigan so that you can put Utsuemi back up with no penalties? Cool. So now that Utsusemi is back up, I guess I'll just play with my pesky while I wait for the recast to cool on Hasso or Seigan so that I can reapply those. Whereas Third Eye, I can just keep the fucker up fulltime.
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Long wall-of-text aside, here's the thing: if you're gonna complain about pick-up parties using /WAR over /NIN because not everyone knows how to play their job (which is somewhat common) then guess what? DON'T FUCKING MERIT IN PICKUPS. It's as simple as that.