Lets just slow this down then.
Starting with the item you posted:
AngelicBonus - when you have 10’000 armour across your gear (pet included) you gain 25% Double Mitigate. This armour has to be on the gear, it can’t be from Strength heroic, or any of the talents. It has to be on the gear.
Double Mitigate - when an enemy hits you, you’ll reduce the incoming damage using your armour and resist, there is then an X% chance that you’ll reduce the incoming damage again by your armour and resist.
For example, the enemy hits you for 100’000 damage, you have effectivly 70% damage reduction from your armour, you now take 30’000 damage. But with double mitigate, you now have a chance to reduce that 30’000 by 70% again… you now only take 9’000 damage.
Ally healing - the attacking character will heal its ally by x% of its base HP.
Main character has Ally Healing: you now heal your hireling by x% of your base HP when attacking.
Hireling has Ally Healing: the hireling now heals you by x% of its base HP when attacking.
Next lets go over the more commonly used damage reduction.
Dodge - you have a chance when struck to take NO damage at all.
This is pretty easy to get, you always have 10% base dodge, thats just free and built in.
Dexterity heroic gives 10% dodge at +20
Put an epic affix of +10% dodge on the pet,
And a crystal affix on any gear for +30% dodge.
You now have a total of 60% dodge
(If you use epiphany, you can change every gear nature to Evasion using Beryl? crystals for 1.5% dodge each, totaling another 9% dodge)
Block - same as dodge, you have a chance to take NO damage at all.
Block can only be put on the OffHand (OH) item, unless it is naturally found on a legendary warrior item.
For example, Indra’s Boon is a legendary item that naturally has Block on it. If you buy enough Indra’s Boon, eventually you’ll find one with a crystal block for +45%
Put an epic affix of +15% on your OH item
And as a warrior, if you use a shield, you get 10% block for free (this is only for warriors, and only when you use a shield)
Thats a total of 70% (Epiphany can raise the cap from 60%)
Now… without Epiphany, thats 60% dodge, and 60% block - effectivly 84% chance to take NO damage at all.
Add on Sanctuary mythic to your amulet, and on that 16% chance that you do get hit, you’ll survive!
Let me try to explain the 100% block…
Block has a maximum cap/limit of 60%, but Epiphany can increase that by 5% per rank. In this case, we want Epiphany at rank (7) for +35%
60% * 1.35 = 81%
Now we use the Indra’s Boon chest from earlier, but this time use that with a crystal Block% on the OH item too
Bulwark is a Talent for Warriors that gives +0.5% Block per rank when you get hit (this goes over the 60% cap/limit that Block has)
Talents can go up to +40, so 40*0.5 = 20% Block when something tries ti attack you.
You now have 81% Block + 20% Block for 101% Block.
Hope you understood all of that, i tried to explain it as best as i could