So, ill go through all the questions.

1. It depends on who you want in your lineup and if you want a high combo chase or just a regular chase.

Comparisons:

Mystery: Very similar with both clearing buffs and shields on the first activation and damage on the second. (Assuming they are the same Battlefield Cooldown and Chakra cost, which I think they are) Yugito gets the bonus of doing ignition, attacking 12 units instead of just an entire lineup, and decreasing the attacks by 12%. Yugito's is better.

Standard Attack:

Han: Attack 3 units in front row, chance of causing Knockdown. This attack is really good at killing edo deidera spiders.

Edo Yugito: Attack front row, chance of causing 10 combo and repulse. Good at getting a high combo chase started.

Both are situational for your lineups, but in most cases Han has the better standard attack.

Passive 1:

Han stops first auto attack.

Edo Yugito: Needs 10 combo, chases and causes a 4 combo to 3 units (so 10->24 hit)

Both depend on how you use the ninja (tank vs. support) but in most cases Han has the better first passive.

Passive 2:

Han: Low float to Knockdown

Edo Yugito: Low Float to knockdown, adds ignition

Edo Yugito's is better because she adds ignition

Passive 3: Both gain health back based on ninjutsu attribute.

Han: Super Armor

Yugito: Gets 20 chakra back, 40 if there are 2 jin in your lineup.

There are very few things that negate super armor in this game and in most situations, Han is better,

In my opinion, Han is probably the better one. But Edo Yugito does have quite the advantages as well. The main difference is what the ninjas are used for. Han is better as a tank because of super armor and blocking an auto, Edo Yugito is a better support and better for jin lineups (especially with Kurama Naruto and Roshi). I plan on going for her because I have Kurama Naruto. Add in water main poison tai passive, which Edo Yugito's combo chase is taijutsu damage as well, and you can turn 2 Roshi and Kurama Naruto (40 chakra from Yugito Passive).

2. Probably. The limited time treasures in CN are only really useful for the Edo Jinchuriki and getting a couple Edo Hashirama fragments. Oasis is basically saying, we know people would only draw for these ninjas, so we'll release them in events.

3. 180-210 I think. Technically, the Edo Jin are the super rare. If you're talking about either Itachi Susanoo fragments or Edo Hashirama, its Edo Hashirama.