Italian Elections and Politics 2018: Yellow Tide

[Polkergeist]

So what is this Rosatellum system?

https://www.reuters.com/article/us-italy-politics-election/italy-calls-confidence-votes-in-senate-on-new-electoral-law-idUSKBN1CT289

Is it just as the article says;

The proposed election law would distribute almost two-thirds of the seats in parliament on a proportional basis, while a third would be decided in a first-past-the-post vote on specific candidates.

Sounds like a version of the Japanese system except with less FPTP MPs?

[Polkergeist]

At first blush, I think a problem with this system is how the Alliances will determine their FPTP candidates.

Will the largest party in the coalition take all the FPTP candidacies?

Will they be split proportionally between the parties in an alliance? If so what proportion?

There is also the issue of which party will get the safe seats, marginal seats, no-chance seats for an alliance.

Presumably this is all down to negotiation between the parties inside an alliance, however this is a source of instability in itself.