most importantly is to specify, without specification your useless. spreading yourself too thin in an mmorpg is not very smart: because there is not enough time to try and play all the roles.
Its true that a tank needs END aka VIT, but it wont matter much if you can kill the enemy quicker, most important part is to hold hate. Also END and VIT comes natural for a warrior anyways, as well as better armor, so to call pure str is the best choice. besides END is more useless in this game than STR, potions and red stones are easy to come by.
Also if your next response is "I do more dmg," wheres the video, talk is cheap.
This is What pure STR and damage can do at level 20-22. play until the end =) where I get the G. axe.
http://www.megavideo.com/?v=WY3BYUWI
SPR is for g@y warriors btw