Hi guys and girls,
I am new to Dragon Age (never even played through the first game) but now i have some time and want to play the trilogy
I want to play as a Mage (Arcane Warrior/Blood Mage) or a Templar.
I have a few questions regarding Mages vs. Templar:
1) How do Mages fight templar? Aren't the Templar "immune" to Magic? So how is it even possible to fight as a Mage when facing a Templar?
2) RPG-Stuff: Do the decisions of my character in Origins have a big impact on DAII? And do my decisions have in DAII have a big impact on DAIII? Because i would like to create a RPG Friendly Adventure when i play the three games.
I know you play different characters in every game but would it be wise to play on the side of the mages or templars throughout the entire trilogy if you look at it from a RPG Perspective or doesn't it really matter if you play one Game as a Templar and one game as a Mage?
That sounds weird, i know. But i really can not decide playing as Templar or Mage. So i would like to play as both when playing the 3 games and still have a somewhat RPG/Lore Friendly experience for myself. Do you get my point
?
3) Gameplay: Is it easier as a templar or a Arcane Warrior/Blood Mage to play the game? I like a challenge so i will play on a high difficulty 
Thanks!
Templars are not immune to magic, but they have resistence to magic, have high mental defense and they can nulify magic and mana. At least this is DA:O Templars, DA2 is different and DA:I is totally different
The only weakness to Mage against Templars is this, Templars can drain their mana out, meaning Mages cannot cast spells, that's why Mages who despise Templars end up using Blood Magic, in which using blood as the fuel instead of mana. This is the importance of Blood Magic in game-play and story-wise originally.
Because of Mages can use blood to fuel magic, and furthermore controling people through thier blood, that's why the Chantry banned the use of Blood Magic.
If you play as Amell no matter male or female, Hawke is your cousin in DA2. The import are not so major to notice, just some minor things to each games. There are no major impact for your decision on each games.
Arcane Warrior-Blood Mage is insanely powerful, if you know how to build and play it correctly. It will not be easy, depends on what types of AW-BM you build. Take a not that if you like casting spells, there is weapon draw issue that can be annoying. But you don't need to worry about mana because you can cast spells with health points instead, and mana used for sustain spells. You cannot heal normally unless you turn off the BM sustain, means you have to suck life force of your companions, any healing spells don't work.
Playing as Templar is most easy, no matter what type of a warrior you're, the most easiest is Sword and Shield Templar. If you have thief companion, you can steal Gregoir shield that give extra magic resistence. Your focus is to resist magic as high as possible, to a point where you don't care what magic being cast at you. To bad that Clease Aura don't effect on self, but if you pair up with Alistair you can debuff eachother. Make sure you have enough Willpower and stamina to cast Cleanse Aura and Holy Smite as well using power attacks. As for second specializatin i suggest Champion, don't choose Berserker because it will drain your stamina. With Champion specialization, if you're two handed, you can AoE knockdown three times with War Cry, Sweep and Holy Smite, if you have enough stamina