This is the build i do almost exclusively, but once you made magic 38 for heavy armor eligible ,
you better add some dexterity before continuing up magic.
The two starting spells is mana shield & rock armor, it will keep you alive until you can use armor,
and it will add another layer once you got armor.
Spell wisp & might compound each other before activating for example rock armor & flaming weapons,
so those two will be necessary for optimum, and mana clash is a given, the opener when any mage is around.
You will want to switch off spell wisp & might after sustainables is activated,
to free up mana pool & drain.
i'm using wardens boots & blood dragon armor early when mana pool is still low to lash out mana clash,
but with levels mana pool increases so then its Cailens stuff all the way for a PC player.
Health also increases for each level, so its better to select AW first, and then BM when you got any health to cast from.
I strongly recommend the mod that lets the blood magic activator keep running for as long as You want,
instead of vanilla that switches it off when you least expect it.