Imo these are the best crafting recipes: Blood Rings, Blood Amulets, Blood Gloves, Caster Amulets, Caster Belts, and Hit Power Gloves. plug this into the aforementioned equation and you get (1/2 (93)) + (1/2 (88)) = 90 This is because the lowest ilvl amulet you can gamble is 93 - 5, which = 88. The ilvl = (1/2 clvl) + (1/2 magic item ilvl) so you would want to be lvl 93 to craft this amulet. This means you want the crafted item's ilvl to be 90 or greater. the affix for +2 necro skills has an axlvl90. If you use the caster amulet recipe you are guaranteed faster cast rate(5-10%). Well lets, if you want to craft an amulet with +2 to necro skills and faster cast rate.

So, you are now probably asking, what does this all mean?!?! why do you need to know all this?! Quote from name='Arreat Summit' » Note: Since the qlvl of amulets is always 1 the term int(qlvl/2) is always 0, so the affix level is effectively determined by ilvl, so affix level = crafted item ilvl = (1/2 clvl) + (1/2 magic item ilvl).

Diablo 2 crafted amulet