[Battlemage] Callidor's Tempest: To Agrivix or not Agrivix?

I’m trying to build some sort of “Aether Knight” Battlemage, and I’m currently sitting at 8/16 with Callidor’s Tempest and 4/12 Inferno and I’m not sure if I should get the transmuter or not… Thoughts?

I never played a CT build so my idea may not be valid.

I think its better to not to take the transmuter, because Reckless Power boost casting speed instead of attack speed.
If you want a power attack, since you re a battlemage, perhaps a transmuted blade arc is better?