When I fought Ygerna (on nightmare) I summoned my creature right away (which I probably didn't need to do, though he did keep Behrlihn occupied), cast WotR, by which time she was right up to me, so I cast Splitting Arrows, jumped back and IIRC only needed one regular arrow to finish her off.
I did something similar(on hard) but with Fireball and exploding arrows as well as splitting arrows.I also boosted my armor with a potion.I had some melee skills but found it best to keep her as far away as possible. I am also tempted to try a purer build but it just seems less tactical and much more time-consuming, particularly at lower levels. Most games don't give you the option of creating a build with so many different skills. Your'e more usually forced to create a pure mage, warrior, etc. So if a game gives you a lot more flexibility to create unique types of builds than it seems to make sense to take advantage of it. It's that flexibility that gives the game so much replayability, imo.
