So a Rare with with four mods, Ilvl 8, 22, 30, and 70 would require Clvl 52 to equip.

Clvl req is 3/4 the highest Alvl on an item.

For example a sword dropped by an Mlvl 50 creature would have an Ilvl of 50, and the highest affixes possible on it would be Alvl 50. The Ilvl of an item usually is equal to the maximum possible Alvl.

Alvl (Affix Level): This figure is the level of the affix.

So if you got +%Defense on some kind of armor, you would get either Sturdy, Strong, Blessed, Glorious, Saintly, or Holy, but never more than one on the same item.

No prefixes will occur with others from the same family on the same Rare item.

Magical items have a 50% chance of a suffix only, 25% chance of a prefix only, and 25% chance of both. Rare items can have up to three prefixes, but only one from each family of prefixes. One added complication is that Rares, Uniques, and Item Sets list all of their modifiers by effect, and they can mix and match prefixes, suffixes, and other modifiers freely, so it's difficult to tell what exactly is giving the item a given property. Similar quality modifiers are found on the same item, as they were in Diablo. Like Suffixes and Other Modifiers, Prefixes have a list of modifiers they can and can not occur with. Prefixes occur before an item name and only one per magical item.

Special modifiers - Set/ Unique items only.

Suffixes - Modifiers on magical and rare items.

Prefixes - Modifiers on magical and rare items.

Diablo 2 damage taken goes to mana