*Danger, beginners thoughts are really scary. Read at your own risk.*
Initial hand:
Dora:
Well, we have at least one dora. With enough luck you could discard
getting

and obtaining

while menzen and riichi.
Winning on a

will get riichi, itsuu, dora. Getting luckier even a tsumo/ippatsu tsumo.
Assuming we get a third white dragon instead (menzen, again) we can wait on either a pair of

or

, getting another han out of this hand.
Let\'s try something different.
A starting pon on a third white dragon will get you this:

------

assuming to have discarded one

Now we\'d have to discard another tile: the only pair is the

one, and we will need to break a wait.
The most difficult one (statistically speaking) is the

, so the choice would fall on one of them.
The resulting hand, discarding the

:

------
It\'s not a bad wait, because getting a

and discarding the unuseful 4 bam will get you a tempai on

:

------
Surely easier and more realistic than the Itsuu one: you\'ll need only three tiles to win, instead of four.
This hand will get you only a few points though: 1han out of the white dragon pon and one for the dora, nothing more. (Unless i\'m forgetting/i don\'t know something, which could be easily true)
I can\'t think anything else now. So my answer to the first question is: i\'d discard the

.
Again, i\'m really a beginner: any comment to this post is really welcome. I want to improve
