L'Arachel build

So I just pulled a 4* +atk/-res L'Arachel from the Thracia banner. So I was curious how people have built her with similar iv spreads? I want to use her cause I do enjoy using blue mage cavs and well she's probably better than Ursula, sorry Ursula you getting to 5* will likely be delayed for a long while now. And the only Reinhardts I've ever been able to pull are 2 5* that were both -atk, still use one but it is certainly disappointing especially now that he is in the 3* pool.
Thanks in advanced for any suggestions!