ias is still good, it's just that with that combination of other stats that helm really isn't all that great. You might be able to get a few hundred k for it, I honestly don't know...can't check prices right now. The patch made it so that ias is on par with other stats that increase damage. Like having max crit damage or max ias on an item should yield close to the same amount of damage gain. Before just adding an item with 15% ias shot your dps way up compared to any other stat.
For a weapon you want crit damage, ias, life on hit, primary stat. If your current weapon is around 600 dps or less then you can just get a 900ish dps 1h with no stats for pretty cheap and it will give you a big boost that will help you farm until you can afford to buy or find a weapon with some good stats on it.
Any wizards here using a 1 hand + source? It seems like everyone uses them but I don't want to go from an 1100 dps 2 hander to an 800 dps 1 hander. 1300+ dps can easily be had for ~5 mil on a 2 hander as well. I would be able to gain a good amount of intelligence and crit chance with the 1 hand + source however.