Easy most parties consist of a tank, healer and 2 damage dealers. So I go with well....Me, Ali baby, Wy"I'm a dirty ole lady"nne and none other then...the fiery redhead with a bow and pointy sticks from hell...thats right its Lel"I'm really bi"iana! And thats the game. If you want morrigan then do shapeshifter spirit healer. Wynne's a better choice though. :D
For hard mode: I use Alistair, Wynne and Leliana. Alistair had all the shield upgrades but was set to dish out major damage. His offense just offsetted and blew away the need to "tank" anything...along with of course a bunch of my area of effect spells. Wynne was the healer/mass paralyzer and Leliana was to shatter all the frozen enemies with her crits and one-shot mages with arrow of slaying. Hope that helps.