I can't speak for WAR but I had to switch from 30 STR as paladin to 30 VIT not because I had any trouble tanking but because people said my gear was bad and freaked out. Same people 2 hours after I reallocated, same gear, no complaints. I'll probably switch back. TBH it doesn't really affect anything either way once you have semi decent gear. Like others said, whatever you like best.