General
Nightmare may seem difficult initially, but from what I found it is the fault of the lack of complex customization features for your AI (ex.if target is frozen, use longshot; ex. if within 2 meters of enemy, use fade step) companions that makes it dreadful, at least until you get to level 12.
1. A common error that I found in the game was when I told my companions to hold position (ex. ranged companions for bonus damage on elevation) in order to protect my weak ranged offense, they moved forward and got smashed in the face. In order to correct this, I set all my companions to follow themselves, unless I was fighting a dragon in which I would set my mages to defend my melee. The AI, at least from my experience, most likely followed their orders when set this way.
2. Unless you plan on going to Hissing Wastes early to cheese the game with the best gear early on in the Tomb of Fairel, then I would focus on getting the bonus 4 potions inquisition perk in Forces, rather than connections to get short list (which allows merchants to sell superb gear, i.e the best gear in the game).
3. Loot ALL the elf root you can find on your way and always use your radar to ping items, because you will be needing upgrades and extra regeneration potions. Save before quests (they glow green), because you CANNOT do certain companion quests (Dorian and Iron Bulls' quests seem to be bugged) and you will be locked out of dialogue and possible romances, should you pursue them. Also, save before a boss encounter (hmmm... why is this huge room empty and full of cover...) and make sure you don't blow all your potions on the progression part, especially if you chose to side with the templars on the Envy Demon.
4. If it's not a rift, then you can cheese encampments by using stealth and getting out of distance. All the AI have certain distance ranges (like the high dragon, so you can effectively cheese certain encounters. I am only giving this tip because I was under-leveled for certain encounters without knowing it and I was out of potions.
5. After visiting a new area, your companions will most likely all have new dialogue, so speak to them.
6. Grapping Chain and Charging Bull are KEY abilities for your warrior!
7. If there's velifire, there's obviously a secret.
Dragon
1. All the high dragons have the same fighting style, but some summon babies to kill you. Before going to fight a dragon, look up the resistances and weaknesses. They have the gust which is an AOE and you get dragged in and take MASSIVE damage and you should always place your melee and ranged within melee of the dragon in order to avoid deaths and fireballs (if you are far away). When the dragon flies away to bombard you with death, hit disengage and just run around til it perches and make sure that you aren't too close to it when it lands since it will damage you. The higher leveled dragons have guard, so make sure that you have things like war horn, throwing knives, shield bash, and armor penetration in order to damage it. When it is flying away, that is your time to revive any of the fallen and make sure you have max potions.
The fire dragon in the hinterlands is fairly easy and can be accomplished at level 12. When the dragon perches, you can hide underneath it in order to avoid fireballs since it goes somewhere that is impossible to reach while also allowing you to deal with its babies. At 25%, it will perch at an elevation that you can climb up and it won't move. The lighting dragons all have an AOE ability which produces an electric field around you that damages others (you can see it early when your feet glow purple), so spread your DPS out so that they don't kill each other.
Crafting
All mats have tiers, with tier 4 being the highest (only from dragons), and they have fade-touched versions which are masterwork pieces that give certain abilities. Each schematics has either a cloth, leather, or mineral slot, and all gear has a chance to be a masterwork, which is a 10% boost to all of its stats, if you add the masterwork item (just save and re-load to you get it). In addition, some gear have slots for custom gloves and legs which add to the stats of the pre-existing item (i.e superb battlemaster armor, etc.) and you have to craft those from schematics and add it on by modifying your armor at the bench. Like gear, the weapons can be upgrading too with hafts, etc., so get those schematics and add them onto your weapon. In addition to these modifications, you can place runes like superb corrupting rune which adds an animation and an additional damaging effect for your weapons. These runes, like your armor, must be crafted or bought, but none of the good ones are ever sold, but found. If you have the shortlist perk, it allows you to buy the most powerful gear schematics in the Hissing Wastes and they are very expensive (14K gold each), unless you glitch for unlimited items and gold.
Notes (SPOILER ALERT)
1. Dorian, Iron Bull, and Solas' personal quests were bugged for me, but I managed to fix Dorian's. I sided with the mages and even talked to him a lot, but did not exhaust his dialogue in Haven. In order to trigger his quest, The Last of Good Men, I kept some dialogue and when I went to Skyhold for the first time, I went to the main area of the building and immediately obtained the letter from his father from Mother Giselle and gave it to him in the tower, which gave me the quest. For Iron Bull and Solas, I could not trigger their first quests, but I did get Solas' last personal quest by talking to him enough later on and Iron Bulls' , too.
2. If you want peace between Gaspard, the queen, and Brialla in the Winter Palace, make sure that you DON'T USE any of the Halla statues, but only at the exterior and to open the door above the garden to get information on Brialla outside of the library. You don't need all 30 of the dirty secrets, but you need to have approval of 85 and over in order to get the peace. If you want high approval, you must understand Orlesian politics and don't be direct with people, because revealing your cards will cause a lot of disapproval. Also, if you are a nobel and human (not a mage), it is a lot easier since you have the highest approval to start. Mages and elves automatically lose 10 approval at the start, so you might want to toss caprice coins to gain some of that approval. You need to use the statues in order to find the queens elven locket and her manslave, which allows you to have dirt on everybody and will cause the queen to submit. Also, bring Sera for some funny introduction dialolgue 
Retour en haut
I was looking for a nightmare guide and was looking in the Story, Campaign, Characters section. *facepalm*
