Magic Attk @ 11 for all mage pets
http://wiki.project1999.com/Pet_Guide#Magician_Pets
Note that the level 12 pet can summon a level 10 to 13 pet(according to the wiki).
Watch for their max hit dmg to determine their level.
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If that fails,.. summon a fang (level 12)
http://wiki.project1999.com/Summon_Fang
Give that to your pet and it will have a magic weapon. And it wont lower your pets damage because weapons on mage pets can only increase the pet's damage if it's even capable. Has to do with weapon damage vs pet damage. If pet dmg is higher the weapon dmg is ignored.