Who is better for a earth mage?

The Beast Niss
Or
The Archer Kanakok

I can manage to get pet scrolls and equip for them so who should i choose

Commons
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Both have a support skill
Both Cant Burst
Both Water
Both Can ReBirth

Differences
------------
Niss lacks Con While Kanakok doesnt
Kanakok has High Agi While Niss Doesnt
Kanakok having 13 str with 12 int while Niss Has 1 str and having 6 int
Niss doesn't have high normal attack While Kanakok does
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So the Advantages and the Disadvantages are:
-----
Niss = +2 Advantage +2 Disadvantage
Kanakok = +2 Advantage +2 Disadvantage

My resource
http://wlodb.com/topics/15272