As with the new update, now Mercenary Mission will generate random bosses.
If i’m not wrong, i remember i read somewhere each Mission will have different set of bosses that can be generate, so if we want to farm different cards we need to aim in different mission.
For example, Siaullai will spawn set 1, Crystal Mine will spawn set 2, is there any detail info?
Ok, i found somewhere
Hope someone can translate 
Mean if i want to farm Stat Cards, i have to farm Chapel
Its also listed on the patch notes if you want a properly translated version
Edit: Might as well list them here
Now if only everyone would be agreeable to run Catacombs mission going forward. 
I just solo it.
I soloed catacombs (7 bosses) in under 7 mins 3 times yesterday, you need to be geared enough though
Any card that drops i get to keep
Just try to remenber that each mission drop a diferente color of card, Catacombs will only have bosses that drop red cards, Crystal Mine Purple, Siaulai Blue and the Seven Valley drops Green.
does anyone here know how to finish seven valley w/o failing?
The new random bosses make missions more fun… but also more dangerous. Instead of the same bosses which you know by heart after a while, you have to adapt to each boss now. I’ve seen some capable to put constant damage of 2k+ per second on you (a variant of the phantom pain effect of Mastema), or freeze-locking. That means a failed mission in solo mode, since you can’t resurrect anymore.
You have to cross an area in 40 seconds, and it roughly takes 35 seconds to cross it, so you need to be quick. Or bring a chrono with haste.
definitely better with random bosses.
It was really annoying to fight poata and golem with their Knockback
cards can drop with mercenary cubes?? or only salus cubes?
The one that have the card that increases damage against flying can actually one shot builds without CON with one of his attacks.
I have no idea mate 
Cards drop independently of the mission. Just kill one of the random bosses during a mission and you have a chance that the boss drops a card.
i know this… but in salus box, cards can come… i dont know if can come in mercenary box too or only in boss.
No, you cannot get cards from the missions cubes, they’re only available as a random drop from the bosses.
maybe mercenary missions should have to be chosen by the system, just as convent is, this way players would have to experience all of them.
For now, only Saalus gets enough people on auto-match, and crystal mine sometimes gets close to 3 people, what is very very rare, and get’s a lot of time to do it.
I wouldn’t mind the randomness, but a lot of people do all the different missions now. The “issue” is that most people will do with friends or solo, that’s why there might not always be a lot of people doing them.
Although personally, yesterday it was easier to find people queueing for Crystal Mine/Catacombs than Siauliai. I guess because it’s all new, so people are trying them.
I just solo it.
I soloed catacombs (7 bosses) in under 7 mins 3 times yesterday, you need to be geared enough thoughAny card that drops i get to keep
AFAIK, cards drop independently for EACH person… once i saw a boss dropping 2 same cards simultaneously for each different person. So, i can conclude that any card that the boss drop for that person is MEANT to be for that person,
You are mentioning the last phase right.
addition, to be quick you need watch out the traps/circles on ground, those will slow/sleep/freeze you, try to familiar a route that can skip these things
