The Warrior-as a tanker

The warior as a tanker is quite a good choice because of his high defensive and ofensive capabilities.In dungeons and at bosses you will almost everytime find a warior there,because of his great rezistance compared to other roles.The only disadvantage of the warior class as a tanker is the absence of healing tehniques.So,putting in simply a warior is a great tanker until his hp goes down,after that he needs to meditate to regenerate and this might take a while even with advanced meditation because of his high hp.Even so,with some pills and hp leech the warrior could rezist even longer and this could matter a lot in a dungeon,or when camping an important boss (like Shen-Mo,or Vicious-Fist)
Of course,hp recovery pills and/or ornaments aren't always required when camping a boss or going in a dungeon.When camping a really important boss (like def boss,hp boss etc.) you really dont need any hp pills or ornaments because the fact that these kind of bosses are permanently camped,so when he spawns he dies in around 30 seconds.On other less important bosses like Blood Wolf King (ZhenghZhou/ShiZhang boss) or Blade Behind a Smile(Jinan/Datong boss) you might need some hp pills/ornaments or a healer or at least a hybrid nearby to keep your hp at a reasonable level while you kick that boss's azz.
And as for skills and buffs,well the warior really doesn't have a lot to choose,if you want to be a good tanker then pump un defence buff(the one which boosts defence and lowers movespeed),if you want to be a good camper train critical buff(the one which makes your hits land only critical strikes for 30 seconds at the cost of your defence).In any case you still need to train your 2 damage buffs(Yin/Yang and the Oc 1 damage buff).Good luck !