Bloodfrenzy has an innate proc rate of 155 while Hammer of Holy Vengeance has whooping 630, where adding 10 extra would do little difference.

They each have their own mechanics and differ from focuses in the way they stack.

Also you should pay extra attention to the fact that both AC and Attack have two different parts that have to do with hit chance vs damage.

See section about AC, Attack and Damage below for an explanation on some terms used in this part.

This adds to the hit chance part of your Attack.

According to the Safehouse, the cap is at 150 (wich there is no reason to doubt since the information is said to have come from a dev).

Attack - This used to be called Vengeance wich no longer exists, its now just X attack.

The Attack stats on items add to the Power part of the whole Attack rating.

Caps at 250. We should also note that spells that add to Attack to like Spirit of BiLih and Ferine Avatar does not count towards this cap while it seems that Avatar procced from PrimalsPrismatic weapons in fact do count towards this 250 cap.

See explanation below on difference between the to hit and damage parts of Attack.

On the new Rogue epic Nightshade we see two modifiers to backstab.

So if you normally hit for 600, you will hit for 615 with this effect.

Sources indicate that this damage is not mitigated, and adds unmodified to your total damage score.

As of yet, no rogues have accumulated enough of this gear to verify where the cap is, but one would assume that it might be around 100-150.

As another example, Monks have a Flying Kick DMG: 15 on their epic 2.0 which works the same way.

Avoidance - According to Magelos script, Avoidance adds to the avoidance part of the AC.

Taraddar also states: Normally your defense skill and agility contribute to your avoidance ac and increase your chance of being missed.

The Avoidance stat directly adds to this and therefore increases ac.

Caps at 100. Parsing has shown these rough figures: 10 avoidance 1 to avoidance.

Compare to CA3 10 avoidance, LR55 avoidance, RM52.5 avoidance.

See Table 1. Melee Avoidance and Mitigation AAs on the Shaman AAs Demystified page for return per cost info on Avoidance AAs.

Combat Effects - Increases your chance of having your weapons proc.

Parses show 10 combat effects is equal to 1 level of weapon affinity on normal weapons.

Since weapons have different innate proc rate, the effect varies.

Combat Effects would have a higher impact on for example the Ethereal Destroyer, with a low innate proc rate of 85 (100 being standard).

Dmg Eq