I generally play a Warrior's Endurance build with Burst of Aggression being active most of the time so I use a "Run For Your Life!" (Received physical damage -2 while in a Stance) and "of Endurance" (Health + 45 while in a stance). So, obviously, if you know you will be in a stance, those mods help. Otherwise, if you're going to be facing mostly fire or cold enemies, then it helps to have "Sleep Now in the Fire" (+10 Armor vs. Fire) or "Leaf on the Wind" (+10 Armor vs. Cold).
Also, if you're going to walk through lava (which means you will be repeatedly crippled and burning), it helps to have a shield with "Swift as the Wind" (Reduces Crippled duration on you by 20%).