Originally Posted by
Unregistered
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You can roll the dice and still possibly get the slayer without first having to clear the e-gacha of all other SRs. Clearing out the other SRs is more of a way to guarantee you'll get the new SR slayers as they're added, so long as you never reset the gacha. It's 'pay Nutaku a lot now so you can rely only on free e-gacha tickets to get the slayers from then on.'
I don't know how many tickets it would take to get the card to which you're referring in either situation, because you don't always get a SR when you spend a ticket. Don't forget to stock up on card reveals, too.