I would think that in HC you would be wanting to have more VIT and mitigation in general...before focusing on DPS.
I'd probably suggest BT pants that have 60+AR and 200+VIT. Not sure what the market is like in hardcore, honestly...but in softcore those are pretty readily available.
I'd also like to see VIT on the boots. Since they can only go to 100 INT they're kind of a wast for DPS reasons...might as well stack some VIT there...like 50 or so. Price shouldn't be too bad.
I would also think that being at the 2.73 breakpont would be adventageous. You'd need a trifecta ammy to do that. And its gonna have to be an 8 IAS one...and that not gonna be cheap with high CC and CD. If you get a faster chant will you might only need 6 or 7. So look for that as you're also chant Will shopping.
SHoulders should be cheap too....low 200's with int, but 90+VIT. and some STR as well. usually very cheap.
WH....definitely some AR there...lacunis too.
I think my first three things would be AR/VIT BT pants, INT/VIT Nat Boots, AR/VIT WH.
The biggest thing with low paragon wizards is low INT and low VIT. The paragon levels really help with life. As you paragon up and start stacking VIT then you can lesson your dependence on gear...like your Force. And as you start stacking life (from paragons and gear) then you can start to back off on AR (since INT = AR).