My character's a custom class, too, but he's terrible at destruction. I had a healing spell or two, but I didn't feel like I would need them. My character has very high strength and endurance, but that came at the cost of not increasing my other stats much. His base intelligence and wisdom are both only 34. His personality is around 64, which is his third-highest stat. His luck is whatever it started out as, possibly 30 or 40. He recently got a ring that increases agility greatly, so he's got somewhere between 60 and 80 while wearing it. All that, coupled with (mostly) bad equipment, doesn't make my character very good at most things. Unless it involves carrying something or getting beaten up (he's good against atronachs, because of his high HP), he's not much good. But all that carrying stuff means he currently has over 50k worth of items he won't use!
