Please help me

This may sound like a noob question, but I am kinda new. I need help and I dont want to mess my armor up. Say for example if i put runes of major abosrbtion into each of my knights armor pieces (5) does all those runes give the effect still? Does it work? How does the rune with armor thing work? please reply.

You can only get the bonus from one of the runes. The rest will do nothing for you. They do not stack. You could add other rune of your primary class like swordsmanship or strength to different armor pieces and get the bonuses from them.

I could be wrong, but I'm pretty sure that if you wear a full set of, say knights armor, all pieces will have the absorption if you just put one rune in. However if you wear a rune in a knights piece, any other types of armor you wear wont get the bonus, like if you wear a platemail helmet, it wont have absorption.

Wrong. Runes effect all peices. As for added bonuses of the armor. Those only apply if the damage was taken on that piece of armor or not. Everytime you are hit the game assigns the damage to a location then factors in any armor propertes of that location. So if you have +10AC vs Ele on your legs but don't have it on anything else and you are hit with a flare on the chest you will not get the bonus.

Note - The weapon AC bonus effect all pieces.

I see.... So should i just keep my knights armor or..what?

i may have missed it but even if the bonuses dont stack the PENALTIES (-50/-75) do stack.

if you add all those major/superiors be looking at slim hp

Note that Damage Reduction effect is the only effect of an armor which is global in effect. It's been tested and proved that you only need 1 piece of knights or ascalon armor to get the full benefit from it's damage reduction. This might be considered an inconsistency or "bug" or design fault, but thats the way it works. This means if you have ascalon boots on you will get a -2 global damage reduction, you don't need anymore pieces to get the damage reduction - at least till ANet changes it so you do *shrugs*

However as stated, any other bonus - such as +20 armor vs physical, +15 vs fire, etc will only apply to the piece of armor that it's on. Armor bonuses that come from weapons & focii are global in that they will always apply irrespective of where you get hit or from what side. Armor bonuses from shields are also global, but they only apply if your hit/attacked from the front - as shields only effect the frontal attacks.. if you get hit from behind the shield armor won't apply.

Gladiator armor passes Knight's by a long shot, but if you like the look go ahead and keep it. If you're looking for effectiveness, go for Platemail for extra armor against elemental attacks, or Gladiator armor for extra energy and physical armor.

I'll summarize what the others said, since I don't think there's a single post anywhere that focuses on this.

As far as Knight's and Ascalon armor work now (apparently they haven't changed anything with the SF update), they both have damage reduction of -2. This reduction is universal; that is, you only need to wear one piece for it to work. Wearing more than one piece of Knight's or Ascalon armor gives no additional benefit; Knight's and Ascalon armor do not stack with themselves or with each other, the only differences between them being cosmetic. No matter how many pieces of Knight's and Ascalon armor you wear, you will always get the same benefit as one piece; that is, -2 damage reduction.

Damage reduction is one of two armor bonuses that are universal. Armor versus specific damage types, such as physical, fire, light, etc. are not universal. Those apply only to the specific armor piece. Stat bonuses such as additional energy and attribute level bonuses are technically universal since it wouldn't make much sense for them to apply to a single piece. The only other universal armor effect is the +15 while casting on Mesmer armor, which really doesn't matter to a Warrior.

Runes of absorption do stack with Knight's and Ascalon armor; if you wear a Rune of Major Absorption (-2 universal damage reduction), it will stack with the Knight's or Ascalon armor to provide -4 damage. It also stacks with shield damage reduction, provided the attack comes from the front.

However, Runes of Absorption, just like any type of Rune, will not stack with each other. Only the best Rune will take effect; if you wear a Minor Rune and a Major Rune of Absorption, you'll only get the -2 from the Major and not the -1 from the Minor.

That is all. I probably will have to bookmark this though for the several hundred other people who will ask this question...