@Manu83 I made an account exclusively for this question for two reasons one. One, I considered a similar witchcraft build and dual-wielding. Two, Chrest is such an asshole I couldn't resist. Before I throw in my opinions, Chrest wasted paragraphs explaining himself because he refused to help someone because he assumed you were a inept. Dude, get off your high-horse, no-one gives a flying fuck... whether you think you helping someone you deem unprepared to receive your insight is good or bad. These forums are made to help people, not helping someone despite their comprehension, is still not helpful; so why are you here. I honestly believe you don't have a clue about the subject matter and just want to insert your ego. Has the thought ever crossed your mind that even though he didn't understand what you might have said to help, could then be used as a reference to come back to? No you didn't cause your retarded, moving on...
No, this build you speak of is not just OK, I see you been on the forums for quite some time now so you've probably already done this build but just in case, its awesome. Let's go over why this build is awesome; dual-wielding and wand skills stack, which means that this will be the strongest caster build late game for single targeting. This is because, dual-wielding as you know reduces the cost of AP to -3 at level 5, meaning you have one wand doing damage for free. Combine this with 50% damage boost at level 5 with wand skill and your nnow doing 100% more damage.
Though, that is only the weapon skills... The reason why you were most likely advised Witchcraft is because it's great for supplementing weapon builds. Witchcraft works fucking gorgeously with dual-wielding wands because of Oath of Desecration and Lower Resistances, two skills that are only novice btw. OoD is going to buff your damage by an additional 40% and Lower Resistances is going to soften up any elemental sponges. So that's 140% damage, combined with a softened up enemy depending on their resistances.
In short, your going to be wreaking face! That is not an understatement, this build is so powerful but the fun does not end there. Optimizing this build with glass cannon would be a must in my opinion. Your going to be doubling your turn action points meaning 7 turns into 14. You will be presented with two options at this point with the build: one would be to pump as many points into Int to decrease cooldowns on buffs and de-buffs or the other is to beef your Con and Spd so that after each turn you can attack 6 TIMES OR MORE! Depending on how much you invest into those stats. As stated, glass cannon would turn what you perceive to be a support into one of, if not the best ranged damage dealer in the game. I'll leave the math to you be if you get your Spd to where your getting 9 actions points a turn combining, that turns into 18 with glass cannon and if you level you Con so that action points max 18 you'll have a full AP bar every turn.
This build has so much flexibility with attributes that you could experiment with Precision to increase your crit-chance, which could double that 140% damage on a more consistent basis making it a decent to good burst damage build depending on stat investment. Umm, you might be able to craft wands with the critical chance buff at crafting 5 MAYBE I'm super unsure about that but you might find it worth your time to find out because that could make this a super viable crit build that would easily out dpt anything in this game.
This is obviously only viable for mid-late game usage as dual-wielding would need to be maxed. I'd strongly advise putting a couple points in crafting for one of characters and cheese the game with inferno grenades until you can get to a higher level; all early game mage builds are very underwhelming, that's just a fact, unless you optimism with glass cannon but it's still underwhelming.
That's my super long advice, hope you read it even though I'm a year and half late. I know so much about this game unlike Chrest and I hope that you found my comment helpful.
