If you prefer to use a different player character, it still pays to know the spells and how they work, so you can build your companions effectively. With Group Heal, Morrigan helps heal some of the wounds of the group. There are basically two that I can think of although they really aren't so bad. That skill should be taken simply because only you can use it. .
But if a solo on nightmare is possible, it would be with a mage. This build is best paired with Merrill and Varric and a Warrior in my experience, since they provide endless chances for cross class combos. With this, you should pretty much steamroll almost everything on nightmare with no effort. Bog standard single target damage with decent range. I personally hate Neophyte robe so I wear the Champion armor for the look.
The duration is a bit on the short side. Summoning line Very little experience with this line. In Morrigan's case, her natural shapeshifting ability and the Blood Mage tree can give her a major advantage. This is particularly effective if you play blood mage and put a lot of points into constitution so you can also match tank hp. Spirit Healer Rather than have Wynne act as the party's healer, you can learn the art from a tome from the Wonders of Thedas store in Denerim, opening the option for Morrigan.
I can see how this would be powerful- however it isn't often you would try to tank spells. If you stack strength or dex you just seem to very rarely miss, I haven't checked my figures recently though. A really solid opener and great for archers etc, if you don't have fireball I'd definitely take this though if you do, it doesn't add much. It is considered archived - the discussion is over. Glyph line Great crowd control line, works well in conjunction with the fire line especially.
Poor mans earthquake which only trips once. One spell point and you have a great panic button. Cheers for the comments, sorry it keeps locking me out so I cant finish what I'm writing. I lowered drain life to 3 from 4 because like you say it is very meh, higher damage is better for bursting down touch enemies. Other use is to immobolise tough enemies to clear up their buddies first, it's quite rarely resisted. Also if you don't mind chugging potions or kiting excessively. Works decently as self defence for mages too though it is fairly often resisted by high ranks.
Again it can have it's uses throughout, though I tend to prefer it late game when all the offensive options are in place and willpower is plentiful. Unless you are aiming for mana clash then it's basically free. Morrigan's Primary Stats As a mage, Morrigan primarily focuses on two main attributes: magic and willpower. I was impressed with how it works when the right situation arises, but there just aren't many situations like that. It has the biggest potential AoE damage in the entire game, bar none.
It may help for the dangerous 2h yellow guys, but usually its rarely noticable. The single best spell is Group Heal. If you don't take fire then use ice damage boosting items instead, or lightning if you choose that route. Therefore, everything here is mostly just opinion, and so I'll try to keep it brief. It's less useful in open field settings admittedly, but plopped in doorways it's very broken.
Though you could go for this line with Wynne who is already invested. Set it on auto tactics or micro manage as you desire. It has moderate mana cost and 30s refire rate. However, I've heard that it's glitched in that it doesn't do damage if it fails, and I also heard that it can steal experience points. While it's true that Blood Wound is insanely good, even without it, Blood Mage is by far the best specialization for a caster mage. In addition you can simply knock back potions or activate blood magic when low on mana. It also has the nice benefit of making you tankier.
In fact, so much so that it is probably a good idea to make your main character a rogue and pass every coercion check without even trying. This is just an example and by no means definitive. I do like this late game though, where in combination with rock armour you can turn yourself into a serious tank for an average amount of mana. I think they draw crazy threat too? Blood sacrifice- It is nice, but I find that I could do absolutely fine without it since blood magic cancels instantly and is quick activation. I won't cover Arcane warrior or shapeshifter here because they both open up way more additional options and I'm not knowledgeable enough about them to write definitive information. Blood Control at 16 is alright, but really superfluous.