Yes, I have tried VIT stacking and I recommend a more balanced number between VIT and STR. Skill speed, I studied and it takes way too much skill speed to make an appreciable difference and I don't recommend it as a primary or even secondary stat. Crit Rate Materia and accessories I highly recommend. WAR gets a substantial boost to all the Crit Rate you put on your gear. So my current build that I'm really happy with is a balanced amount of VIT and STR and substantial amounts of Crit (which depending on my gear set teeters between 409 and 446 crit). Interestingly, I also get Accuracy and Skill Speed on the same gear that I use so those stats just "come with".

The rest of becoming a WAR tank is leveling GLA and PGL for your cross class abilities and learning how to use your abilities in the best way.

To see an example of my tanking as WAR you can see it here http://na.finalfantasyxiv.com/lodestone/character/175326/blog/252659/

So long as things stay civil I will leave the video open for comments.