[Messianic]

As a wizard, I was able to quad kite effectively nearly naked. I had a few quest items that brought my int to 160 (staff of the wheel, acumen mask, runescale cloak).

A bigger mana pool is of limited value until mid 50s. If you need all of your mana, you're probably quadding in an area that isn't going to be efficient enough for you for some time.

If you're getting lots of resists, you're killing mobs too high for you.

Here's how I did it:

~26-31: Mammoths in EF
31-34: Giant skels in Rathe Mts
34-42: 4 guards in NK - 2 near gypsy tower and 2 on bridge to SK (they have comparable hp to stoneleer cockatrices/thorny succulents/sarnak berzerkers/Sabretooth tigresses in OT)
42-45: Yetis near the ice tunnel in Dreadlands
45-51: Bloodgills
51-53: Spirocs
53-54: Raptors

And that's where I stand. I never needed a large mana pool until Raptors, since a quad was only 75-70% of my mana when i was moderately geared.