I do really like to mix Int based Evocation Wizard with Wild Magic Sorcerer either 10/2 or 2/10. It gives you the flexibility of a wizard with the fun & chaos of WM, and the extra firepower of sorcery points - and you don't have to worry about messing up Astarion's hair when thunderwaving a bunch of enemies. Good old fashioned sneaking (despite Gale's complaints) along with all the invisibility rings and potions has worked well enough for me so far - but I haven't tried HM yet.
