I have high lvl war. I haven't used drk tho. TypIcally there's a mixture of players that recommends differ ways of mixing in str/vit stats. Either through attribute points or gear. But in about 2-3 weeks, SE is making adjustments to all jobs. Tank being that str won't be as good for u as vit. So I personally would suggest just to do all vit. If u look around on forums you'll see what I mean about the stat changes coming in update. As for cross class skills, especially war... u do/should lvl gld for cross class. Theres abilities you'll need as a tank, such as provoke. Dont know exact lvl for gld, but you'll need awareness which is the highest ability you'll need as a war. So maybe gld to 34ish? Dont remember what lvl u get awareness at.