How long does it take you to acquire 20 Zetas?

I'd say having Talzin and Wicket at 7* for their events is worth it. Those events run 2 days and usually happen once a month and you get 2 zetas minimum per completion so that would be 8 extra zetas minimum per month! They are also both viable squads for Sith Raid (though moreso on the NS). Fleet store currency is probably the best way to get zetas. Especially since they've slacked in adding any new ships or toons there...im racking up zetas every other day!