since Bangkok is not yet finished, i believe the triad and yakuza choices will be the basis of fights because if you noticed the fight in Bangkok is not yet available so that means a new feature is being worked on for that. i think that if you supported triads, you can only fight mafias that are supporting yakuza. I'm not sure but this is what i think of it.
The tier that the "Repel the Yakuza" job is in in "Mafia Wars" is the Hitman Tier.
Currently Mafia Wars Bangkok is closed to the public. For now you can collect the Triad Coin, Yakuza Sake and Thai Note in New York. You will be given the Thai Passport to go to Bangkok on the launch date.
Mafia Wars Hong Kong Triad
repel the yakuza
Hitman Tier - Repel the yakuza.
Hitman (lvls 18 -24) - Repel the Yakuza
By performing the "Repel the Yakuza" job in the Hitman tier.
Asian Museum Break-in ..in NY at Soldier tier
Yakudza side will bring you strong attack skills and Triad - defense. However, it is to be allied by both sides.
you will eventually get it you just have too do the job alot of times
At this point in the Beta Stage, the Triads have a greater Defense where as the Yakuza have a higher attack. This is being determined by the FACTIONS store of each. So in order to decide at this point it is a matter of game style. IF you are a MOGUL, or a High energy account you might want to consider TRIAD for the protection against attacker. For Fighting account there is no question YAKUZA, supplemented with good defensive items from MOSCOW you would do well. If your energy is ridiculously high then you could get the best of both worlds by balancing the jobs as to increase trust in both factions. More play testing has to be done to see if this is a viable strategy so for now I would advise you too examine you play style and choose what suits it
There is a Mafia Wars player around level 1400 which is supposed to be the best player.