So far I have 4 items, the boots, bracer, arms and gloves. I am still wearing the chaotic armor because the foci on these pieces are worse or too different. The worst are the gloves with a focus for Ancient: Strike of Chaos which is a spell I don't even use. Using the primitive leather gloves for the stats and mana regen over these gloves. I can't use the boots because then I wouldn't have fire focus, the arms would lose me magic focus (also same effect as Chaotic robe).
I don't necessarily think the focus or stats on the Chaotic items are too powerful, just about perfect for the role they play. However I think the Kael upgrades need to be switched around, or retuned or something for the role they play - the gear you want to get before attempting your first real raids.