Order of difficulty to unlock the type B

[KomissarBojanchev]

This is a list of which type Bs are easiest and hardest to unlock IMO. Note: I don't have any crystal ship so I don't know anything about it
Hardest:
1#hardest Zoltan B- while the 1st achievemnt is very easy the next ones are almost impossible, especially the 3rd one.Still haven't unlocked it yet .

2# Kestrel B- The only achievement largely possible to get is the 2nd one. The other 2 are massive luck challenges surely requiring huge amounts of attempts. I only got the Kestrel B after the hundredth run or so after getting the 3rd achievement.

3# Rock B- All achievements require a large to very large amount of dedication except maybe the 2nd. And with very little garauntee of success. Still haven't unlocked the rock B yet.

Normal:
#4 Lanius B- although the achievements may look daunting at first, the 1st and 3rd require significantly less luck and just some dedication , except the practically impossible 2nd one. I unlocked it after getting the 1st and 3rd achievements in a single run.

5# Slug B- ironically the 1st achievement is the hardest one because of needing a lot of money and the right target to get it. 2nd one is very easy, while the 3rd one is quite luck dependant but still you will get many chances to unlock it. I unlocked the slug B after a lucky run where I got the 3rd achievemnt.

#6 Stealth B- Also ironic, the 3rd achievement is easiest for this ship. while the first 2 are very luck dependant there isn't a single specific situation where you can get them and thus have a lot of chances. I unlocked it aftera few lucky runs getting the achievements one by one.

#7 Fed B- the 2nd achievement is quite easy due to having the right crew for the job, while the 1st one needs a lot of luck and dedication in the normal and hard difficulty, it is quite achievable on easy. 3rd one is impossible but not really necessary to achieve. I unlocked it while doing some special runs on easy just for that purpose.

Easy to Unlock:
#8 Engi B- all of the achievements needed to unlock it are require very little dedication and comparably small amount of luck. for the first just keep the drones taken from the multiple random events, for the second fight an ushielded rebel scout which is almost certain to be found, while the 3rd achievement is quite possible with that ion weapon on the engi A. This was the one of the first ships I unlocked the type B with.

#9 mantis B- the first 2 achievements are so easy they look more like general progression. I've unlocked them multiple times on any difficulty. Like the Fed B, the 3rd achievement is almost impossible, it is not necessary due to the easyness of the others.

Do you agree with my difficulty ratings?