While Divine Storm, Crusader Strike, and auto-attack benefit from armor penetration, it is not a stat that ret paladins should be stacking tons of on their gear. Most of the paladins attacks are Holy damage. As such, it ignores armor. It has been said on various forums and chat rooms that it is better to get strength with a little bit of intellect mixed in for good measure.
Mail armor is worn by warriors and paladins from when they first start until level 40 when they get access to plate armor. Shaman and hunters wear leather until 40 when they get access to mail armor. Although Death Knights start at 55 and therefore start in plate armor, they can wear mail armor, although that probably isn't a good idea as DK's are melee and need the armor to survive. No other class is allowed to wear mail armor.
You just need to learn it from your proffession trainer. Warriors and Paladins can learn plate at level 40 Shamans and Hunters can learn mail at level 40 No other classes can learn any other armor types than the one they start with.
Retribution is an act of revenge or retaliation, something done in reaction to a wrong, or to a perceived wrong.
no but it can be beneficial
if you have a good bow you don't need armor
Not financial retribution, but there may be a need to resolve co-mingled finances. For example, there may be joint bank accounts and debts that would need to be divided.
You have to access the armor in using the Armor tool. If you have the DA armor, you need to slide "Armor Type" bar at the top of the tool until you find the DA armor.
To repair your Brotherhood armor, you need T51-B Armor, or an additional set of Brotherhood armor. So you probably used your T51-B Armor to repair it, depleting it.
You need to do the Destroyer part 3 quest to fight War Armor
You need live to get some of the armor. You can also go on youtube and watch videos that tell you the names of armor and how to get them.
You need to be specific. If you mean the Chameleon armor, you need to beat Otto in challenge mode AGAIN.
You need to buy it ingame