Martial Anelace would be good for Vorpal/Savage, but by that time, you might also be into using your TP for a Chain Affinity-assisted SA [Insert Physical Spell Here], in which case, the sword won't do much for you, since that isn't a Weapon Skill performed by that weapon (think of it as the same as if you off-handed the Martial weapon while WSing with the main hand weapon).
I held off on doing CASA Physical Spells until I had Trick Attack for the main reason that I kept taking hate from *everyone* in the party for doing it, and ended up wasting a lot of MP from the party (mine as well as other's) trying to keep me alive because I was now tanking. I'm not saying that to say I had crappy tanks or anything, it's just
that's how much damage CASA pulls down. Once you hit 40 and try it a couple of times (check out 300% on Jet Stream or Terror Touch, or wait 4 levels and use it on Mandibular Bite), you might be convinced to agree.
As an aside, I like reminding the endless DWAM Warriors that I see in my parties these days that yes, Warrior *is* a tanking job, and I do so by dropping a CASATA Death Scissors or Dimensional Death off behind them as I pass by on my way to stay away from the front of the mob.
