(I didn't find the thread to link it here )
If You have a 2H weapon with 6% lifesteal, equip it, cast storm armor and equip back your old weapon, you will have the full duration of storm armor as if you have a 6% lifesteal weapon.
As a CM/WW with the shocking aspect rune, you can get a lot of healing.
Also with the PvP patch incoming, storm armor with the thunderstorm or scramble runes are a good choice.
PS: The 6% lifesteal affect ONLY the damage from storm armor.