Timing Ignore Pain and Wrath of the Berserker is an easy way to fill your hp. Same can be said with IP+WW with a large pack of mobs. I can WW through a group of 20+ in hell with IP up and not take damage.
For the 2nd link, the two shouts really help in debuffing them and buffing yourself. The extra armor is nice as well, and Swords to Ploughshare with Battle Rage can really make the difference in a long fight.