well there are other tanks besides warriors that have good aggro.
I was running my dwarf pally through Crushbone at lvl 8, and i could not get aggro, even though i had a really good 2 hander with high dps. Was a druid there, with a fast 1 hander, and a haste belt, and he was doing more damage than me just meeleing...
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then i got lvl 9 and my first spells. Blindness. He could not grab aggro from me again. It was sooo sweet..
so if aggro is your worry, roll a pally or sk.... even ranger can snap aggro like a charm after lvl 9..