I would then say Edwin. He's a conjurer and thus is able to use a greater variety of spells than Dynaheir. Dynaheir cannot use conjuration/summoning and enchantment/charm spells. Edwin cannot use Divination. I don't know Edwin's stats though. If Dynaheir's are better, then I'd use her. Just a choice of personal preference here.
-Jafin
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I am Jafin, arch-mage of the HADB clan!