So, for tactics, Morika is a front-line brawler, though for her most devistating attacks, she needs to charge, which can limit her attacks. However, she does have her spells available for long-range attacks, including the ever-useful call lightning and the more powerful arc lightning, along with the thematically appropriate giant's wrath, which turns pebbles into boulders. To combat any grappling that may occur, she also has body of the sun, that'll make her too hot to pick up.
Also, she makes a decent scout, particularly with wild instincts running (it gives her a crazy bonus to Spot and Listen checks) and speak with animals.
She does have some healing spells prepped (including mass lesser vigor), and two different movement spells (longstrider for extra ground speed and master air for flight) to get around the battlefield, or just into the fortress.
Finally, I have a nice spell called last breath. If Morika can get to you within one round of your death, she can have you reincarnated with no level, Constitution, or hit point loss.
Her typical tactics might include charging in, attacking, then backing up the next round and casting a spell. Rinse, repeat, until out of hit points or someone needs to un-die.