I gamble for amulets mostly, because I like to craft them.
Does the ilvl matter to crafting? And what's the ilvl on gambled items anyway? I read a guide years ago but I've forgotten...
My gambling plan:
<L87: Rings (all decent mods can be gambled at lower levels)
L87: Coronets (all will have a chance to get +2 to skills)
L90: Amulets (all will have a chance to get +2 to skills from L95 on, but don't wait that long)
L92: Circlets (all will have a chance to get +2 to skills)
L93: Amulets for crafting (all will have a chance to get +2 to skills when crafting with him/her)
Of course you wear Gheed's and Edge while gambling, to reduce prices.
Yes. When crafting, new ilvl = ilvl/2 + charlvl/2, rounded down before adding.
When gambling, the item will have an item level from charlvl-5 to charlvl+4, randomly, so for a L93 character it's at least L88. When crafting with the same character, the new ilvl becomes 88/2 + 93/2 = 90 which is the minimum ilvl for amulets to get +2 to all skills of a certain class.