I finally beat the dragon mission. It took me three tries : first one was a complete failure (was still trying to figure out my new upgrades), second one was a successful abort and the third one was a winner. I will share some thoughts about it, sorry for my bad english...
My setup (I played all four runner all by myself):
- Troll Face : 97 Karma with upgrades Competence (5), In Training (5), Just Tough (5) and Prime Runner (50)
- Ork Street Samurai : 86 Karma with upgrades Combat Fu (5), In Training (5) and Prime Runner (50)
- Human Decker : 82 Karma with upgrades Button Masher (5), In Training (5) and Prime Runner (50)
- Elf Mage : 77 Karma with upgrades Minor Knack (5) and Prime Runner (50)
Logic behind those upgrades :
- To defeat a dragon's aspect, I have to deal 8 damage from the same color or an insane amount of any color damage. So I chose the upgrades that boosted the role color of my runners.
- Defeating quickly the opponents and keeping the crossfire level low were priorities, so I chose upgrades that boost my initial firepower. Prime Runner for example is basically giving me one extra basic card without diluting my starting deck.
How it went :
- Contrary to the other missions, the Dragon Fight was a game of patience. The goal was to gain a lot of money to buy enough cards from the Black Market and deal the required damages to the dragon.
- Each round, I was able to defeat all obstacles, preventing the rise of the crossfire level. It seems hard to to believe, but the game spams 3 obstacles per round, which is less than the Crossfire mission. The covert aspects of the dragon deal no damage, so I basically had to deal with only 3 opponents each round.
- I was lucky : I did not get any event that send more obstacles and the flipped obstacles were evenly distributed (i.e. i did not get three 11-Nuyen ennemies at once).
- When you are ready to get to the Enraged aspects of the dragon, you better be ready to finish him quickly since he can now deal 2 damages.
- Each runners focused their puchased around their role color.
- At the end of the game, the Black Market was empty (I bought it all, yup), the Crossfire level was at 0 and all my runners were kinda healthy. The normal obstacles deck had to be reshuffled. I did not count how many rounds it took (it was late), but I would guess that the game lasted around 10-12 rounds (might be more).
TL; DR: this mission requires luck and skills. Skills to choose the good upgrades and the right actions each turn; luck in the drawing of events and obstacles. And patience, also, to defeat all opponents each round and accumulate enough cards and firepower.