I would say it's pretty clear not to combine. This option is available in the future to, if the price is higher.

Alphas will become pretty short in the (near?)future. From the common Alphas about 30 – 40 thousand were produced. A max leveled card need 379 singles, which will be necessary to play on the top. So all Alphas combined are only about 100 maxed leveled individual cards and I would assume that many people who already have a strong card would pay high prices for the last chance to max level them.