Yes dragon rend will solve all your problems. And despite what you may see others claiming about dragons one shot chewing on you at full health, that's a load of crap. I have in fact never been eaten, and it only triggers at lowish health. (Unless you have like only 100-200 health, which you shouldn't anyway.) I play on Elite, and dragons are easy as hell with either daedric/bone armor. (The ancient dragons can put a little hurt on at times.)
PS: Dragons are actually a decent challenge at times on master difficulty, but then you run into bandits/mages that are using the console commands.