3 chipped gem recipe will bring ilvl down to 25. That as low as it can get. I have level 12 character that just obtain his first cube. Since the crafting product will have low ilvl, it should have those +skele mastery/skele warrior summon/amplify damage staffmod right?
And since it is elite wand, the qlvl should be high enough to spawn the +2 necromancer skill?
You're trying to up your chances for SM/RS on your crafted wand, is that it?
Regardless of if its an elite wand or not, +2 Necro has an alvl of 50, so your wand will need to be, after crafting, at least that high. Which means you can spawn any +skill affix on it, so your odds arent any better...
Your best bet is crafting for L50 and hoping for +2 Necro/+2 Summoning