In terms of your left hand side gear that is correct, your VIT is maxed out if you have anything i80 or above.

For your right hand side, you have a choice of going STR accessories, or VIT accessories. You probably want to go full STR accessories most of the time so that you can burst people down faster as a dragoon. There are situations where it might be useful to use some or full VIT accessories though. If you're doing slaughter and have the 4 or 8 kill buff, you're going to be a huge target as when people kill you they get a ton of bonus points. You are also doing 20-40% extra damage, so at that point it may make sense to swap into some VIT accessories (you can do it during the match as long as you're out of combat).

In my experience, usually melee/bards work best with no VIT accessories, BLM/SMN benefit from having 2-3 pieces, and healers work best always using full VIT accessories. Obviously this is completely subjective and depends on your playstyle and experience so feel free to test it out.