Take this for what it's worth:

PetaMine divs per share from the last 7 days = 0.00008705
(0.00001245+0.00000924+0.00001195+0.00001658+0.00001244+0.00001294+0.00001145)

For one share of Scrypt-X, we'd get 5 shares of Peta, so weekly becomes 0.00043525
(0.00008705 * 5)

This week's Scrypt-X share was only 0.00009065/share, or ~21% of the Peta equivalent divs.
(0.00009065 / 0.00043525)


A one time payout of 90.5 BTC comes to 0.003074 / share.

Here's my opinion of how the options rank:

(2) or (3) > (4) > (1)